KR930000910Y1 - Microprocessor control led display device - Google Patents

Abstract

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Description

Microprocessor Control LED Indicators

1 is a circuit diagram of a conventional LED display device.

2 is a circuit diagram of an LED display by a microprocessor according to the present invention.

3 is a timing diagram for explaining the operation of FIG.

* Explanation of symbols for main parts of the drawings

DESCRIPTION OF SYMBOLS 1 Microprocessors 2-6 6: First-5th latch drive part

7 to 11: first to fifth register array

12 latch portion 13 LED driver

14 LED part 15: resistor array

The present invention relates to an LED display device by a microprocessor, and more particularly, to an LED display device by a microprocessor that causes LEDs to be driven by multiplexing by arranging the LEDs in a matrix.

Conventional LED (Light Emitting Diode) display device uses a plurality of latch drivers to turn on or off the LED as shown in FIG. 1 so that the circuit configuration is complicated, manufacturing cost is high, power consumption is high This was accompanied.

Therefore, an object of the present invention is to provide an LED display by a microprocessor that can solve the above disadvantages.

According to the present invention, a plurality of latch drivers 7 to 11 connected in parallel with the microprocessor 1 and a plurality of latch drivers 2 to 6 and a plurality of register arrays 7 to 11 are connected. An LED display for turning LEDs on or off in accordance with a control signal of the microprocessor (1), comprising: one latching a signal connected and input from the data buses (DB ₀ to DB ₇ ) of the microprocessor (1). Is connected from the latch unit 12 of the microprocessor ₁ to the control terminals P ₁ to P ₅ of the microprocessor ₁ to drive the LEDs, and from the latch unit 12 a resistor array ( It is composed of an LED unit 14 arranged in a matrix so as to be connected directly to its own thermal terminal from the LED driver 13 via its own terminal via 15), and the data bus output signal DB of the microprocessor 1. ₀ to DB ₇ tasks According to the fish signals P ₁ to P ₅ is characterized in that the LED of the LED unit 14 is configured to be ON or Off.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram of a conventional LED display, in which data bus signals DB ₀ to DB ₇ of the microprocessor 1 are applied in parallel to respective input terminals of the first to fifth latch drivers 2 to 6, and the respective latches. Each output terminal of the drivers 2 to 6 is connected to the first to fifth register arrays 7 to 11 through eight LEDs, and the resistor arrays 7 to 11 are connected to the Vcc terminal to be powered. do. At this time, one or more of the first to fifth latch drivers 2 to 6 are enabled according to the output of the control signals P ₁ to P ₅ of the microprocessor 1 to enable the data bus of the microprocessor 1. The LED of the latch driver selected according to the signals DB ₀ to DB ₇ emits light.

2 is a circuit diagram of an LED display by a microprocessor according to the present invention, in which data bus signals DB ₀ to DB ₇ of the microprocessor 1 are connected to respective input terminals of the latch unit 12, and the latch unit 12 ) the respective output terminals are respectively connected to the line terminal of the register array 15, resistor R ₁ to R the LED unit (14 by way of a matrix array, each of ₈₎ of the.

In addition, the control terminals P ₁ to P ₄ of the microprocessor ₁ are connected to the respective thermal terminals of the LED unit 14 via the LED driver 13.

Referring to Figure 3 the operation of the present invention configured as described above is as follows.

When the microprocessor 1 inputs a data signal for driving LEDs corresponding to one or more rows of the LED unit 14 to the latch unit 12 through the data bus terminals DB ₀ to DB ₇ , the latch is latched. The unit 12 latches an input data signal. At this time, one or more of the first to fifth columns of the LED unit 14 is selected according to the control signal outputs of the control terminals P ₁ to P ₄ of the microprocessor 1 to close the circuit through the LED driver 13. For example, LEDs corresponding to the first column in T ₁ to T ₂ hours of FIG. ₃ correspond to columns _{3 in} T ₃ to T ₄ hours, and LEDs corresponding to the column in T ₂ to T ₃ hours. LEDs, LEDs corresponding to four columns in T ₄ to T ₅ hours, and LEDs corresponding to column _{5 in} T ₅ to T ₆ hours, emit light according to the data bus signals DB ₀ to DB ₇ .

Also, for example, if the LEDs corresponding to the first column of the LED unit 14 are turned on for 4 mS and then the first column is turned on from the second column to the fifth column, the LED unit 14 appears to be always on. do.

As described above, according to the present invention, since the circuit configuration is simple, the manufacturing price is low and power consumption is reduced.

Claims (1)

Microprocessor 1, a plurality of latch drivers 2 to 6, a plurality of register arrays, a plurality of LEDs and a plurality of microprocessor control LED displays formed by combining a plurality of LEDs An apparatus comprising: one latch unit 12 for latching a signal connected to and input from a data bus DB ₀ to DB _{7 of} the microprocessor 1, and a control terminal P ₁ of the microprocessor _1. To P ₅ ), the LED driver 13 for driving the LEDs, and the latch unit 12 to its own terminal via the resistor array 15, and directly from the LED driver 13. And LED units 14 arranged in a matrix so as to be connected to the thermal terminals of the microprocessor 1, and the LED units 14 according to data bus output signals DB ₀ to DB ₇ and control signals P ₁ to P ₅ of the microprocessor ₁ . LED on or off Microprocessor-controlled LED display device being configured.