TWM540969U - LED lamp - Google Patents

Description

LED tube

The present invention relates to an LED tube, and more particularly to an LED tube that can be directly driven by a commercial power of 220 volts or 110 volts.

At present, the use of light-emitting diodes (LEDs) for lighting has become commonplace, and light-emitting diodes are generally defined as products driven by low-voltage direct current, so there must be a power-driver, which generates additional energy consumption and reduces The product life.

In view of this, the main purpose of this creation is to provide an LED tube that can be directly driven by the mains.

In order to achieve the above object, the present invention provides an LED lamp tube comprising a plurality of groups of light-emitting units connected in series, the total voltage of all the series-connected light-emitting units being a mains voltage, and each group of light-emitting units including a rectifying unit and being driven by the rectifying unit At least one set of LED light strings, each set of LED light strings comprising a plurality of LEDs connected in series, wherein the rectifying units of the adjacent light emitting units are connected in series.

The LED light string is a plurality of groups, and each group of LED light strings is connected in parallel.

The rectifying unit is a bridge rectifier circuit.

The bridge rectifier circuit is composed of four LEDs.

The bridge rectifier circuit is composed of four commutators.

The light-emitting units are thirteen groups, and each group of light-emitting units includes two sets of parallel LED light strings, and each set of LED light strings includes five LEDs connected in series.

The mains voltage is 220 volts or 110 volts.

The LED tube of this creation gives up the steady-current and steady-current electronic circuit. It is a combination of multiple LEDs. It can be designed to directly drive with 220 volt or 110 volt AC, minimizing the application of electronic components. Reduce costs, extend life, and contribute to energy conservation and environmental protection.

L1~L14‧‧‧LED

D1~D4‧‧‧ commutator

FIG. 1 is a schematic diagram of an embodiment of an LED lamp tube, wherein all of the LEDs are designed as a circuit, and one of the groups is a light-emitting unit; FIG. 2 is a schematic diagram of another embodiment of the LED lamp tube, LED and commutator. The circuit with the design is shown as one of the light-emitting units; FIG. 3 is a schematic diagram showing that the number of series or parallel LEDs in the present creation is adjusted according to the rules of the LED.

In order to facilitate a better understanding of the structure and effect of the present invention, the following detailed description will be made with reference to the accompanying drawings and preferred embodiments.

The LED tube of the present invention comprises a plurality of sets of light-emitting units connected in series, the total voltage of all the series-connected light-emitting units is a mains voltage, and each set of light-emitting units comprises a rectifying unit and at least one set of LED light strings driven by the rectifying unit, each The set of LED light strings includes a plurality of LEDs in series. The rectifying units of the adjacent lighting units are connected in series. If the LED light string is in multiple groups, each group of LED light strings is connected in parallel.

As shown in FIG. 1 , it is an embodiment of the LED lamp tube. In this embodiment, the LED tube has a length of 48 吋, and the substrate circuit is as shown in FIG. 1 , and four LEDs (L1, L2, and L3 are used). , L4) constitutes a bridge rectifier circuit, the bridge rectifier circuit is used to drive two sets of parallel LED light strings. In this embodiment, each group of LED light strings is composed of five LEDs connected in series, as shown in FIG. The LED light string includes: LED light string (L5, L6, L7, L8, L9), and LED light string (L10, L11, L12, L13, L14), four LEDs of the bridge rectifier circuit, and two sets of LED lights Each of the five LEDs of the string, a total of fourteen LEDs form a group of light-emitting units. In this embodiment, thirteen sets of light-emitting units are connected in series to be directly driven by a voltage of 220 volts, for example, a forward voltage of 2.4 volts. Based on the LED, the total voltage of the fourteen LEDs of a group of light-emitting units is 16.8 volts, which is convenient to calculate with 17 volts. The total voltage of all the LEDs after the thirteen groups of light-emitting units are connected is 221 volts, which can be directly driven by 220 volts. The implementation process is satisfactory. The experiment proves that the appropriate series and parallel combination of LEDs with fixed characteristics can directly drive the 220 volts of the mains. The LED used as the rectification part is only half-bright because of the bridge rectification. Therefore, the spacing of the LEDs should be reduced. Half to maintain a uniform brightness.

This creation is based on the forward voltage of the LED. If the voltage changes, it needs to be reconfigured. The purpose is to allow the entire LED string to be driven by the power supply voltage.

In this creation, the four LEDs for rectification can also be replaced by a rectifier (Rectifier), that is, a bridge rectifier circuit is formed by four commutators, as shown in FIG. 2, the illumination unit shown includes: four rectifications A bridge rectifier circuit composed of sub-elements (D1, D2, D3, D4), a set of LED light strings (L1, L2, L3, L4, L5) formed by connecting five LEDs in series, and another five LEDs are connected in series to form another A group of LED light strings (L6, L7, L8, L9, L10), two sets of LED light strings are connected in parallel. However, due to the different specifications of the commutator and the LED, the number of LED strings needs to be re-allocated to match the specifications of the power supply. As shown in Figure 3, using different specifications of LEDs, it is necessary to match the number of series and parallel, as shown in Figure 3. Each group of LED light strings in each group of light-emitting units, that is, LED light strings (L1, L2, L3, L4, L5, L6) and LED light strings (L7, L8, L9, L10, L11, L12) are composed of six LEDs.

The light-emitting unit of the LED tube of the present invention is not limited to thirteen groups, and the LED string of each group of the light-emitting units is not limited to two groups in parallel, and the number of LEDs connected in series in each group of LED strings is not limited. Five or six in the embodiment, the assembly of LED series and parallel in this creation should be adjusted according to the rules of the LED, in order to cooperate with the rules of the mains power supply, so that the external power supply directly drives the LED lamp to normally emit light. For example, according to the following calculation method, an LED lamp having a light-emitting unit capable of driving at a commercial voltage of 220 or 110 volts can be easily designed by those skilled in the art.

Calculation method:

set up:

V(line): supply voltage

V (LED): LED forward voltage

V(rect): commutator forward voltage

n: number of LEDs in each group of LED strings

m: the total number of series of light-emitting units

With the above settings, the following calculation methods are available:

Full LED: V(line)={(2+n)V(LED)}. m

Mixed LED: V (line) = {2V (rect) + nV (LED)}. m.

The LED tube of the present invention can have the following characteristics:

1. Energy saving issues

This creation uses the mains to directly drive the LEDs. Therefore, the use of electronic components is minimized, wiring work is reduced, and the energy consumption is directly reduced in addition to cost reduction. See the data in Test Table 1 for details.

Both samples were measured under exactly the same test conditions.

2. Power supply problem

This creation is inclined to abandon the unnecessary voltage regulation and steady current system to obtain a longer service life and greater economic benefits, so the product is more suitable for a stable environment of the power supply system.

3. Heat dissipation problem

Compared with the existing LED lamp lines in the market, this creation greatly reduces the use of components and simplifies the circuit, so the heat generation is also relatively reduced. For indoor LED lamps, if necessary, add tiny cooling holes to strengthen The stability of the luminaire and the extension of the life of the luminaire.

4. Life issues

Due to the reduction in the use of electronic components, the life expectancy is significantly prolonged under normal use. It is normally estimated that it should last for five years, especially for places where it is difficult to replace lamps, greatly reducing the frequency of replacement, and reducing the workload and cost of maintenance. And reduce the impact of waste on the environment.

The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the patent application of the present invention.

L1~L14‧‧‧LED

Claims (7)

An LED lamp tube, comprising: a plurality of groups of light-emitting units connected in series, the total voltage of all the series-connected light-emitting units being a mains voltage, each group of light-emitting units comprising a rectifying unit and at least one set of LED lamps driven by the rectifying unit The string, each set of LED light strings comprises a plurality of LEDs connected in series, wherein the rectifying units of the adjacent light emitting units are connected in series. The LED tube of claim 1, wherein the LED string is a plurality of groups, and each group of LED strings is connected in parallel. The LED tube of claim 1 or 2, wherein the rectifying unit is a bridge rectifier circuit. The LED lamp of claim 3, wherein the bridge rectifier circuit is composed of four LEDs. The LED lamp of claim 3, wherein the bridge rectifier circuit is composed of four commutators. The LED tube of claim 1, wherein the light-emitting units are thirteen groups, and each group of light-emitting units comprises two sets of parallel LED light strings, each set of LED light strings comprising five LEDs connected in series. The LED tube of claim 1, wherein the mains voltage is 220 volts or 110 volts.