RU43706U1 - LED SWITCHING DEVICE (LED GROUPS) - Google Patents

Abstract

The utility model relates to electrical engineering and can be used in illumination devices, for example, in Christmas garlands, in medical devices for phototherapy, etc.

The switching device allows, when using a current generator (current stabilizer) as a power source, to ensure the same amount of current flowing through each LED (group of LEDs) both when all LEDs (groups of LEDs) are turned on simultaneously, and when any single LED (group of LEDs) is turned on ) with high efficiency use of the power source. The switching device contains two power buses, two groups of keys by (n-1) key in each (n-number of switched LEDs) and a control unit. The first power leads of the keys of the first group are connected to the first power bus, the second power leads of the keys of the second group are connected to the second power bus, the second power leads of the keys of the first group are connected respectively to the first power leads of the keys of the second group and these connections together with the power buses are the connection points of the switched LEDs (groups of LEDs). The control terminals of the keys of both groups are connected to the control unit in such a way that at any time, only the first key of the second group, or the (n-1) th key of the first group, or one of the key pairs can be opened: (n-2) -th key of the first group and (n-1) -th key of the second group, or all keys of the first and second groups can be closed.

Description

The utility model relates to electrical engineering and can be used in illumination devices, for example, in Christmas garlands, in medical devices for phototherapy and DR.

A device is known that contains a positive (first) and common (second) power bus, a control unit, transistors in an amount equal to the number of LEDs, while the collectors of all transistors are connected to one of the power buses, and the anode is connected to the emitter of each transistor through a current-limiting resistor (cathodic) output of the corresponding LED, and all the cathodic (anode) outputs of the LEDs are connected to another power bus / Bystrov Yu. A., Galunov A.P., Persianov G.M. One hundred circuits with indicators. - M.: Radio and Communications, 1990, pp. 13-15 /.

The disadvantage of such a device is, firstly, that to ensure the flow of a given current through each LED, it is necessary that the resistance of the current-limiting resistor be much greater than the resistance of the corresponding LED. This leads to a significant decrease in the efficiency of use of the power source, and therefore to an increase in its dimensions and mass. Secondly, it is not possible to use a current generator as a power source, which would increase the efficiency of using a power source, since when all the LEDs are turned on simultaneously, the current spread between the LEDs becomes significant due to the spread of the voltage drop across them at a given current, especially when using LEDs with different wavelengths of radiation.

The technical result, the claimed solution is aimed at, is achieved by using the same amount of current flowing through each LED (group of LEDs) as a power source for a current generator (current stabilizer), when turning on all LEDs (groups of LEDs) simultaneously, and when you turn on any one LED (group of LEDs) with the efficient use of a power source.

The technical result is achieved by the fact that in the switching device of the LEDs (groups of LEDs) containing the first and second power buses, the control unit, the first and second groups of keys are introduced with (p-1) keys in each (n is the number of switched LEDs (groups of LEDs) ), and the first power terminals of the keys of the first group are connected to the first power bus, the second power terminals of the keys of the second group are connected to the second power bus, the second power terminal of each key is the first

groups is connected to the first power terminal of the corresponding key of the second group and these connections together with the first and second power buses are the connection points of the indicated LEDs (groups of LEDs), and the control terminals of the keys of both groups are connected to the outputs of the control unit in such a way that at any time only the first key of the second group, or the (n-1) th key of the first group, or respectively one of the key pairs: the first key of the first group and the second key of the second group, the second key of the first group and tr This is the key of the second group, ... (n-2) -th key of the first group and (n-1) -th key of the second group, or all the keys of the first and second groups can be closed. In the proposed device for switching LEDs (groups of LEDs), the keys of the first and second groups are made on transistors of the same type of conductivity.

Next, the utility model is illustrated by drawings.

Figure 1 presents the structural electrical diagram of the proposed device switching LEDs (groups of LEDs).

Figure 2 shows the electrical circuit of one of the possible embodiments of the switching device of the LEDs, when the keys of the first and second groups are made on transistors of the same type of conductivity: n-ρ-n.

The switching device LEDs (groups of LEDs) (Figure 1) contains the first 1 and second 2 power bus. The first power terminals 3.1.1, 3.2.1, .... 3. (n-1) .1 of the keys 3.1, 3.2, .... 3. (n-1) of the first group of keys 3 are connected to the first power bus 1 .the second power terminals 4.1.2, 4.2.2., .... 4. (n-1) .2 keys 4.1, 4.2, .... 4. (n-1) of the second group of keys 4 are connected to the second bus power supply 2. The second power terminals 3.1.2, 3.2.2 .... 3. (n-1) .2 keys 3.1, 3.2, .... 3. (n-1) of the first group of keys 3 are connected respectively to the first power outputs 4.1.1, 4.2.1, .... 4. (nl) .l of keys 4.1, 4.2, .... 4. (n-1) of the second group of keys 4 and these connections together with the first 1 and second 2 power buses are the connection points of the indicated LEDs (groups of light iodine) 5.1, 5.2, .... 5 .. (n -1), 5.n and the control terminals of the keys of both groups are connected to the outputs of the control unit 6 so that only or the first key 4.1 can be opened at any time the second key group 4, or 3. (n-1) -th key of the first key group 3, or one of the key pairs: the first key 3.1 of the first key group 3 and the second key 4.2 of the second key group 4; the second key 3.2 of the first group of keys 3 and the third key 4.3 of the second group of keys 4; ... 3. (n-2) -th key of the first group of keys 3 and 4. (n-1) -th key of the second group of keys 4, or all keys of the first 3 and second 4.groups can be closed

The switching device operates as follows. When applying voltage to the first 1 and second 2 power buses and in such a state of the outputs of the control unit 6, in which all the keys 3.1, 3.2, .... 3. (n-1) of the first group of keys 3 and all the keys 4.1, 4.2 ,. ... 4. (n-1) of the second group of keys 4 are closed, through all the LEDs 5.1, 5.2 .... 5. (n-1), 5.n will be

flow the same current. When the key 4.1 is open, current will flow only through the 5.1 LED and key 4.1. When the key 3. (n-2) and key 4. (n-1) are open at the same time, the current will flow only through LED 5. (n-1), key 3. (n-2) and key 4. (n- 1). When the key 3. (n-1) is open, the current will flow only through the LED 5.p and key 3. (n-1). When using as a source of voltage supplied to the first 1 and second 2 power buses, a current generator (current stabilizer), the amount of current flowing through each LED (group of LEDs) both when all LEDs (groups of LEDs) are turned on at the same time, and when turned on any one LED (group of LEDs) will be the same.

Thus, in the proposed technical solution, when using a current generator (current stabilizer) as a power source, the same amount of current flowing through each LED (group of LEDs) is provided both when all LEDs (groups of LEDs) are turned on simultaneously, and when any single LED is turned on (LED groups) with efficient use of the power supply

A device for switching LEDs (groups of LEDs), in which the keys of the first 3 and second 4 groups are made on transistors of n-ρ-n type (Figure 2), contains a positive power bus 7 (first power bus), to which the collectors of transistors 9.1 are connected, .... 9.4 of the first group of keys 3, and a common power bus 8 (second power bus) to which emitters of transistors 10.1, .... 10.4 of the second group of keys are connected 4. The emitter of each transistor of the first group of keys 3 is connected to the collector of the corresponding transistor second key group 4, and these connections are shared with plus 7 and common 8 power buses are the connection points for LEDs 11.1, .... 11.5. The bases of transistors 9.1, 9.2, 9.3 are connected respectively to the bases of transistors 10.2, 10.3, 10.4 through the corresponding pairs of resistors 12.1-13.2, 12.2-13.3, 12.3-13.4 and connected to the corresponding outputs of the counter 14, which is the output element of the control unit 6. To other conclusions counter 14 through the resistors 12.4 and 13.1 connected respectively the base of transistors 9.4 and 10.1.

The operation of the proposed LED switching device was tested on a layout switching 5 AL 307 LEDs. For the keys of the first 3 and second 4 groups, KT 503 transistors were used. As an output element 14 of the control unit 6, a counter K 561 IE 8 was used, the clock pulses of which served by a button. The LEDs were powered by a linear stabilizer КР 142 ЕН 12, operating in the current stabilization mode.

Claims (2)

1. A device for switching LEDs (groups of LEDs), containing the first and second power buses, a control unit, characterized in that the first and second groups of keys are entered into it with (n-1) keys in each (n is the number of switched LEDs (groups of LEDs) )), and the first power terminals of the keys of the first group are connected to the first power bus, the second power terminals of the keys of the second group are connected to the second power bus, the second power terminal of each key of the first group is connected to the first power terminal of the corresponding key of the second UPPA and these connections together with the first and second power buses are the connection points of the indicated LEDs (groups of LEDs), and the control terminals of the keys of both groups are connected to the outputs of the control unit so that only or the first key of the second group can be opened at any time, or the (n-1) -th key of the first group, or one of the key pairs: the first key of the first group and the second key of the second group, the second key of the first group and the third key of the second group, ... (n-2) -th key of the first groups and the (n-1) th key of the second group, or all keys The first and second groups can be closed. 2. The switching device of the LEDs (groups of LEDs) according to claim 1, characterized in that the keys of the first and second groups are made on transistors of the same type of conductivity.