WO2022246805A1

WO2022246805A1 - Light emitting diode converter and led device

Info

Publication number: WO2022246805A1
Application number: PCT/CN2021/096804
Authority: WO
Inventors: Qiuxiang MAO; Zhiwen Chen
Original assignee: Tridonic Gmbh & Co Kg
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-12-01
Also published as: GB202316658D0; GB2621272A

Abstract

A light emitting diode (LED) converter and device are provided. The LED converter includes: a controller which is configured to control a power supply for a LED, and a push button which is configured to couple with the controller, wherein the push button is isolated from the controller by at least one safety capacitor between the push button and the controller. Therefore, the push button can be isolated from the controller to improve safety while with a simple structure and a low cost.

Description

LIGHT EMITTING DIODE CONVERTER AND LED DEVICE

TECHNICAL FIELD

Embodiments of the present disclosure generally relate to the field of power control circuits, and more particularly, to a light emitting diode (LED) converter and a LED device.

BACKGROUND

Nowadays, a push button is popularly used in a LED converter. For example, the push button is directly connected to a primary side of a transformer in a LED device, such that it is dangerous for a user due to a high voltage from the primary side.

This section introduces aspects that may facilitate a better understanding of the disclosure. Accordingly, the statements of this section are to be read in this light and are not to be understood as admissions about what is in the prior art or what is not in the prior art.

SUMMARY

The inventor found that in order to improve the safety, in some solutions, the push button itself has to be insulated by means of some insulation materials; while in some solutions, the push button has to be isolated by an opto-coupler. However, those solutions are complex in structure and have a high cost.

In order to solve at least part of the above problems, methods, apparatus, devices are provided in the present disclosure. Features and advantages of embodiments of the present disclosure will also be understood from the following description of specific embodiments when read in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of embodiments of the present disclosure.

In general, embodiments of the present disclosure provide a light emitting diode (LED) converter and a LED device. It is expected to isolate the push button to improve safety while with a simple structure and a low cost.

In a first aspect, a light emitting diode (LED) converter is provided. The LED converter includes: a controller which is configured to control a power supply for a LED, and a push button which is configured to couple with the controller, wherein the push button is isolated from the controller by at least one safety capacitor between the push button and the controller.

In some embodiments, the converter further includes: a resistance which is configured to connect with the controller; wherein the resistance and a first safety capacitor are configured between the controller and the push button.

In some embodiments, the first safety capacitor is a Y-Cap.

In some embodiments, the push button is supplied by a voltage, and a second safety capacitor is configured between the voltage and the push button.

In some embodiments, the second safety capacitor is a Y-Cap.

In some embodiments, when the push button is pushed to be on, a current is picked up to the controller through the resistance; when the push button is pushed to be off, there is not current on the resistance.

In some embodiments, the push button is supplied by a pulse width modulation (PWM) signal, and a second safety capacitor is configured between the pulse width modulation (PWM) signal and the push button.

In some embodiments, when the push button is pushed to be on, a signal is picked up to the controller through the resistance; when the push button is pushed to be off, there is not signal on the resistance.

In a second aspect, a LED device is provided. The LED device includes: a transformer having a primary side and a secondary side, wherein the secondary side is connected to a LED; a switching element which is configured to connect to the primary side and control a power supply for the light emitting diode; a controller which is configured to control the switching element, and a push button which is configured to couple with the controller, wherein the push button is isolated from the controller by at least one safety capacitor between the push button and the controller.

According to various embodiments of the present disclosure, a push button is configured to couple with a controller, wherein the push button is isolated from the controller by at least one safety capacitor between the push button and the controller. Therefore, the push button can be isolated from the controller to improve safety while with a simple structure and a low cost.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and benefits of various embodiments of the disclosure will become more fully apparent, by way of example, from the following detailed description with reference to the accompanying drawings, in which like reference numerals or letters are used to designate like or equivalent elements. The drawings are illustrated for facilitating better understanding of the embodiments of the disclosure and not necessarily drawn to scale, in which:

Fig. 1 is a diagram which shows a LED device in accordance with an embodiment of the present disclosure;

Fig. 2 is a diagram which shows another LED device in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION

The present disclosure will now be described with reference to several example embodiments. It should be understood that these embodiments are discussed only for the purpose of enabling those skilled persons in the art to better understand and thus implement the present disclosure, rather than suggesting any limitations on the scope of the present disclosure.

It should be understood that when an element is referred to as being “connected” or “coupled” or “contacted” to another element, it may be directly connected or coupled or contacted to the other element or intervening elements may be present. In contrast, when an element is referred to as being “directly connected” or “directly coupled” or “directly contacted” to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between” , “adjacent” versus “directly adjacent” , etc. ) .

As used herein, the terms “first” and “second” refer to different elements. The singular forms “a” and “an” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises, ” “comprising, ” “has, ” “having, ” “includes” and/or “including” as used herein, specify the presence of stated features, elements, and/or components and the like, but do not preclude the presence or addition of one or more other features, elements, components and/or combinations thereof.

The term “based on” is to be read as “based at least in part on” . The term “cover” is to be read as “at least in part cover” . The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment” . The term “another embodiment” is to be read as “at least one other embodiment” . Other definitions, explicit and implicit, may be included below.

In this disclosure, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

A LED converter and a LED device are provided in the embodiments.

Fig. 1 is a diagram which shows a LED device in accordance with an embodiment of the present disclosure.

As shown in Fig. 1, a LED device 200 includes a LED converter 100. Furthermore, the LED device 200 includes a transformer 300 having a primary side (P1) 301 and a secondary (S1) side 302, wherein the secondary side 302 is connected to a light emitting diode (LED) 400.

Furthermore, as shown in Fig. 1, the LED device 200 includes switching element (Q1) 500 which is configured to connect to the primary side 301 and control a power supply for the light emitting diode 400. The power supply is supplied from the primary side 301 to the secondary side 302 on the control of the switching element 500.

As shown in Fig. 1, the LED converter 100 includes a controller 101 and a push button 102; the controller 101 is configured to control the switching element 500, so as to control the power supply for the LED 400; the push button 102 is configured to couple with the controller 101, wherein the push button 102 is isolated from the controller 101 by at least one safety capacitor (103, 104) between the push button 102and the controller 101.

It should be appreciated that some components or elements are illustrated only as examples in Fig. 1. However, it is not limited thereto, for example, connections or positions of the components or elements may be adjusted, and/or, some components or elements may be omitted. Some element in Fig. 1 such as D1, D2, D3, D4, D5, C3, R2, R3, please refer to relevant art.

As shown in Fig. 1, the LED device 200 includes a transformer having a primary side and a secondary side, but it is not limited thereto. The LED device may alternatively include a non-isolated converter e.g. a boost converter, buck-boost converter, SEPIC converter or buck converter having at least one inductor or transformer.

In some embodiments, the controller 101 is a micro controller unit (MCU) , and it is not limited thereto.

In some embodiments, as shown in Fig. 1, the converter 100 further includes a resistance (R1) 105, which is configured to connect with the controller 101; wherein a first safety capacitor (C1) 103 and the resistance 105 are configured between the controller 101 and the push button 102.

Therefore, the push button 102 can be isolated from the controller 101 to improve safety while with a simple structure and a low cost.

In some embodiments, as shown in Fig. 1, the push button 102 is supplied by a voltage (V1) 600, and a second safety capacitor (C2) 104 is configured between the voltage 600 and the push button 102.

In some embodiments, the first safety capacitor and/or the second safety capacitor are/is Y-Cap. As for the detail about Y-cap, please refer to the relevant art. Therefore, the cost can be further decreased.

In some embodiments, when the push button 102 is pushed to be on (be work) , a current is picked up to the controller 101 through the resistance 105; when the push button 102 is pushed to be off (not be work) , there is not current on the resistance 105. Therefore, the safety can be further improved.

As shown in Fig. 2, a LED device 200 includes a LED converter 100. Furthermore, the LED device 200 includes a transformer 300 having a primary side (P1) 301 and a secondary (S1) side 302, wherein the secondary side 302 is connected to a light emitting diode (LED) 400.

Furthermore, as shown in Fig. 2, the LED device 200 includes switching element (Q1) 500 which is configured to connect to the primary side 301 and control a power supply for the light emitting diode 400.

As shown in Fig. 2, the LED converter 100 includes a controller 101 and a push button 102; the controller 101 is configured to control the switching element 500, so as to control the power supply for the LED 400, the push button 102 is configured to couple with the controller 101, wherein the push button 102 is isolated from the controller 101 by at least one safety capacitor (103, 104) between the push button 102 and the controller 101.

It should be appreciated that some components or elements are illustrated only as examples in Fig. 2. However, it is not limited thereto, for example, connections or positions of the components or elements may be adjusted, and/or, some components or elements may be omitted. Some element in Fig. 1 such as D1, D2, D3, D4, D5, C3, R2, R3, please refer to relevant art.

As shown in Fig. 2, the LED device 200 includes a transformer having a primary side and a secondary side, but it is not limited thereto. The LED device may alternatively include a non-isolated converter e.g. a boost converter, buck-boost converter, SEPIC converter or buck converter having at least one inductor or transformer.

In some embodiments, as shown in Fig. 2, the push button 102 is supplied by a pulse width modulation (PWM) signal 700, and a second safety capacitor (C2) 104 is configured between the pulse width modulation (PWM) signal 700 and the push button 102.

In some embodiments, when the push button 102 is pushed to be on (be work) , a signal is picked up to the controller 101 through the resistance 105; when the push button 102 is pushed to be off (not be work) , there is not signal on the resistance 105. Therefore, the safety can be further improved.

It is to be understood that, the above examples or embodiments are discussed for illustration, rather than limitation. Those skilled in the art would appreciate that there may be many other embodiments or examples within the scope of the present disclosure. Furthermore, some contents of PWM, LED driving may be referred to relevant art, and these are omitted in this disclosure.

In this disclosure, the push button (interface circuit) is not limited as the structure in Fig. 1 and Fig. 2. The push button (interface circuit) may be anyway isolated from the converter and the load (e.g. LED load) due to the embodiments of disclosure.

It can be seen from the above embodiments, a push button is configured to couple with a controller, wherein the push button is isolated from the controller by at least one safety capacitor between the push button and the controller. Therefore, the push button can be isolated from the controller to improve safety while with a simple structure and a low cost.

Further, it is expected that one of ordinary skill, notwithstanding possibly significant effort and many design choices motivated by, for example, available time, current technology, and economic considerations, when guided by the concepts and principles disclosed herein will be readily capable of generating such software instructions and programs and integrated circuits (ICs) with minimal experimentation.

Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device.

While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.

Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous.

Likewise, while several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.

Although the present disclosure has been described in language specific to structural features and/or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

A light emitting diode (LED) converter, comprising:

a controller which is configured to control a power supply for a light emitting diode (LED) , and

a push button which is configured to couple with the controller, wherein the push button is isolated from the controller by at least one safety capacitor between the push button and the controller.
The converter according to claim 1, wherein the converter further comprises:

a resistance which is configured to connect with the controller; wherein a first safety capacitor and the resistance are configured between the controller and the push button.
The converter according to claim 2, wherein the first safety capacitor is a Y-Cap.
The converter according to claim 2, wherein the push button is supplied by a voltage, and a second safety capacitor is configured between the voltage and the push button.
The converter according to claim 4, wherein the second safety capacitor is a Y-Cap.
The converter according to claim 4, wherein when the push button is pushed to be on, a current is picked up to the controller through the resistance; when the push button is pushed to be off, there is not current on the resistance.
The converter according to claim 2, wherein the push button is supplied by a pulse width modulation (PWM) signal, and a second safety capacitor is configured between the pulse width modulation (PWM) signal and the push button.
The converter according to claim 7, wherein the second safety capacitor is a Y-Cap.
The converter according to claim 7, wherein when the push button is pushed to be on, a signal is picked up to the controller through the resistance; when the push button is pushed to be off, there is not signal on the resistance.
A light emitting diode (LED) device, comprising:

a transformer having a primary side and a secondary side, wherein the secondary side is connected to a light emitting diode (LED) ;

a switching element which is configured to connect to the primary side and control a power supply for the light emitting diode;

a controller which is configured to control the switching element, and

a push button which is configured to couple with the controller, wherein the push button is isolated from the controller by at least one safety capacitor between the push button and the controller.