Lighting unit, lighting device and lighting system

Abstract

The utility model relates to a lighting unit, a lighting device and a lighting system, the lighting unit (100) is connected with a driving element (120) and a light modulator (140), the lighting unit (100) comprises: a light emitting assembly (110) comprising a plurality of light emitting units (112) connected in series; and a current limiting circuit (130) including a current limiting element (132) connected in parallel with a part of the plurality of light emitting units, to achieve the technical effects of a simple structure and low cost lighting unit, lighting device, and lighting system capable of deep dimming.

Description

Technical Field

[0001] The present application relates to a lighting unit, a lighting device and a lighting system, and more particularly, to a lighting unit, a lighting device and a lighting system capable of achieving deep dimming in a simple manner. Background Art

[0002] Currently, if Figure 1 As shown, for the lighting device 200', a dimmer 140 (e.g., a phase control dimmer) is usually added before the driving element 120 (e.g., a linear driver) connected to the light-emitting component 110 (e.g., an LED light-emitting element) to dim the light-emitting component 110, that is, to adjust its brightness. The phase control dimmer adjusts the conduction time of the LED light-emitting element in each AC cycle by changing the phase of the AC voltage waveform, thereby controlling the voltage across the LED light-emitting element. During the dimming process, the effective value (root mean square RMS value) of the voltage output by the dimmer will decrease. Since the output voltage of the linear driver is linearly related to the input voltage, when the dimmer is used for deep dimming (e.g., reducing the brightness to 30%, 20%, 10%, etc.), the voltage output by the dimmer may be too low, resulting in the voltage output from the linear driver being lower than the conduction voltage of the LED light-emitting element. This makes deep dimming of the LED light-emitting element actually impossible to achieve. Using a switching power driver can solve this problem because it adjusts the duty cycle of the switch (PWM control) to adjust the voltage and current, allowing it to handle a wide input voltage range and maintain a stable output voltage. However, the design of a switching power driver is complex and costly.

[0003] In view of this, it is desirable to provide an improved lighting device capable of achieving deep dimming, which has a simple structure and low cost. Utility Model Content

[0004] The present application is proposed in view of the above-mentioned problems, and the main purpose of the present application is to provide a lighting unit, a lighting device and a lighting system with a simple structure and low cost that can achieve deep dimming, so as to solve the technical problem that it is difficult for lighting devices in the prior art to achieve deep dimming at low cost.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a lighting unit is provided, which is connected to a driving element and a dimmer, and the lighting unit includes: a light-emitting component, including a plurality of light-emitting units connected in series; and a current limiting circuit, including a current limiting element, which is connected in parallel with a part of the plurality of light-emitting units.

[0006] In this way, using the lighting unit of the present application, even if the voltage output by the driving element is lower than the overall conduction voltage of the plurality of light-emitting units due to deep dimming by the dimmer, as long as the voltage output by the driving element is higher than the conduction voltage of the remaining light-emitting units except the light-emitting unit connected in parallel with the current-limiting element, the remaining light-emitting units can still emit light. Therefore, the lighting unit of the present application can achieve deep dimming, while having a simple structure and low cost.

[0007] In addition, the current limiting circuit can be arranged according to the on-voltage of the light-emitting unit, the total number of the light-emitting units, and the number of light-emitting units that are expected to be turned on during deep dimming, so that the current limiting element is connected in parallel with a predetermined number of light-emitting units, thereby achieving that when the voltage output from the driving element is less than the overall on-voltage of the light-emitting unit but greater than the on-voltage of the remaining light-emitting units among the multiple light-emitting units except the predetermined number of light-emitting units, the remaining light-emitting units still emit light at a desired brightness.

[0008] Further, according to an embodiment of the present application, the light-emitting component also includes at least one substrate, and the plurality of light-emitting units are distributed on the at least one substrate.

[0009] In this way, the current limiting circuit can be arranged on the substrate or outside the substrate, thereby arranging the current limiting circuit in various forms.

[0010] Further, according to one embodiment of the present application, the light-emitting component includes only one substrate, and the current limiting circuit is arranged on the substrate; or the light-emitting component includes a plurality of substrates connected in sequence, each substrate being arranged with at least one light-emitting unit, and the current limiting circuit is arranged on one of the plurality of substrates or outside the plurality of substrates.

[0011] Further, according to an embodiment of the present application, the current limiting circuit is arranged on a substrate, and the current limiting element includes a resistive material layer coated on a portion of the surface of the substrate.

[0012] In this way, the current limiting element can be formed by directly coating a resistive material layer on a substrate through a semiconductor packaging process without additionally providing elements or wiring.

[0013] Furthermore, according to one embodiment of the present application, the current limiting circuit also includes a conductive material layer coated on the surface of the substrate, which is arranged at both ends of the resistive material layer and extends outward from both ends of the resistive material layer, and the two extended ends of the conductive material layer are respectively in contact with the two ends of the partial light-emitting unit.

[0014] In this way, a current limiting circuit can be formed by coating directly on a substrate through a semiconductor packaging process without the need for additional components or wiring. The current limiting circuit thus formed is relatively stable, not easily damaged, and does not affect the appearance of the lighting device.

[0015] Further, according to an embodiment of the present application, the current limiting circuit is arranged on a substrate, and the current limiting circuit also includes a first wire and a second wire, one end of the current limiting element is connected to one end of the partial light-emitting unit on the substrate through the first wire, and the other end of the current limiting element is connected to the other end of the partial light-emitting unit through the second wire.

[0016] In this way, by additionally pasting the current limiting element, the first wire and the second wire on the substrate to form a current limiting circuit, the processing technology of the current limiting circuit is simple and does not affect the appearance of the lighting device.

[0017] Further, according to an embodiment of the present application, the light-emitting component includes multiple substrates, and the current limiting circuit is arranged outside the multiple substrates, wherein each substrate and at least one light-emitting unit arranged on the substrate form a filament, and the current limiting circuit also includes a first wire and a second wire, one end of the current limiting element is connected to one end of at least one predetermined filament among the multiple filaments through the first wire, and the other end of the current limiting element is connected to the other end of the at least one filament through the second wire.

[0018] In this way, a current limiting circuit is formed by additionally arranging a current limiting element connected in parallel with a predetermined number of filaments on the outside of the substrate and the filaments without complicated manufacturing processes. Thus, the current limiting circuit is visible in the lighting device, making it easy to check whether the current limiting circuit is damaged and to replace the current limiting circuit.

[0019] Further, according to an embodiment of the present application, the light-emitting component includes multiple substrates, and the current limiting circuit is arranged outside the multiple substrates, wherein each substrate and at least one light-emitting unit arranged on the substrate form a filament, the driving element includes a first output end, a second output end and a third output end, the first output end is connected to one end of the light-emitting component, the second output end is connected to the other end of the light-emitting component, and the third output end is connected between two predetermined adjacent filaments among the multiple filaments. The current limiting circuit also includes a first wire and a second wire, one end of the current limiting element is connected to the third output end through the first wire, and the other end of the current limiting element is connected to the first output end or the second output end through the second wire.

[0020] In this way, the current limiting circuit is arranged in the driving element instead of in or near the light-emitting component, and the process is simple, so that an improved lighting unit and lighting device with simple structure and low cost while achieving deep dimming can be formed.

[0021] Further, according to an embodiment of the present application, there are multiple current limiting circuits, and the sum of the number of light-emitting units connected in parallel with the multiple current limiting elements included in the multiple current limiting circuits is less than the total number of light-emitting units in the light-emitting assembly.

[0022] In this way, the current limiting circuit can be arbitrarily arranged according to the on-voltage of the light-emitting unit, the total number of the light-emitting units, and the number of light-emitting units that are expected to be turned on during deep dimming, so that the current limiting element is connected in parallel with a predetermined number of light-emitting units, thereby achieving that when the voltage output from the driving element is less than the overall on-voltage of the light-emitting unit but greater than the on-voltage of the remaining light-emitting units among the multiple light-emitting units except the predetermined number of light-emitting units, the remaining light-emitting units emit light with a desired brightness.

[0023] Further, according to an embodiment of the present application, the light-emitting unit is an LED light-emitting unit.

[0024] Further, according to an embodiment of the present application, the current limiting element is a resistor, and the current limiting circuit is a resistor circuit.

[0025] In this way, the resistor can be used to form a current limiting element and a current limiting circuit, that is, the resistor can be used to form a bypass circuit of some light-emitting units connected in parallel.

[0026] According to another aspect of the present application, a lighting device is provided, which is connected to a dimmer. The lighting device includes: the above-mentioned lighting unit, and a driving element, wherein an output end of the driving element is connected to a light-emitting component of the lighting unit.

[0027] In this way, using the lighting device of the present application, even if the voltage output by the driving element is lower than the overall conduction voltage of the plurality of light-emitting units due to deep dimming by the dimmer, as long as the voltage output by the driving element is higher than the conduction voltage of the remaining light-emitting units except the light-emitting unit connected in parallel with the current-limiting element, the remaining light-emitting units can still emit light. Therefore, the lighting device of the present application can achieve deep dimming, while having a simple structure and low cost.

[0028] Further, according to an embodiment of the present application, the driving element is a linear driving element.

[0029] In this way, when the dimmer performs deep dimming and causes the voltage output by the linear driving element to be lower than the overall conduction voltage of the multiple light-emitting units, as long as the voltage output by the linear driving element is higher than the conduction voltage of the remaining light-emitting units among the multiple light-emitting units except the light-emitting units connected in parallel with the current limiting element, the remaining light-emitting units can still emit light.

[0030] According to another aspect of the present application, a lighting system is provided, which includes: the lighting device described above, and a dimmer, wherein an output end of the dimmer is connected to an input end of a driving element of the lighting device.

[0031] In an embodiment of the present application, a lighting unit is provided, which is connected to a driving element and a dimmer, and the lighting unit includes: a light-emitting component, including a plurality of light-emitting units connected in series; and a current-limiting circuit, including a current-limiting element, which is connected in parallel with a part of the plurality of light-emitting units, so as to at least solve the technical problem that it is difficult for lighting devices in the prior art to achieve deep dimming at low cost, thereby achieving the technical effect of providing an improved lighting device with a simple structure and low cost that can achieve deep dimming. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0033] Figure 1 A circuit connection schematic diagram of a lighting device in the prior art is shown;

[0034] Figure 2 is a circuit connection diagram of a lighting unit, a lighting device, and a lighting system according to an embodiment of the present application;

[0035] Figure 3A is a schematic diagram of the arrangement of a current limiting circuit in a lighting unit, a lighting device, and a lighting system according to a first exemplary embodiment of the present application, Figure 3B Shown with Figure 3A A schematic diagram of the appearance of the corresponding lighting device;

[0036] Figure 4A is a schematic diagram of the arrangement of a current limiting circuit in a lighting unit, a lighting device, and a lighting system according to a second exemplary embodiment of the present application, Figure 4B Shown with Figure 4A A schematic diagram of the appearance of the corresponding lighting device;

[0037] Figure 5 is a schematic diagram of the arrangement of a current limiting circuit in a lighting unit, a lighting device, and a lighting system according to a third exemplary embodiment of the present application;

[0038] Figure 6 It is a schematic diagram of the arrangement of a current limiting circuit in a lighting unit, a lighting device, and a lighting system according to a fourth exemplary embodiment of the present application.

[0039] The above drawings include the following reference numerals:

[0040] 100: Lighting unit

[0041] 110: Light emitting components

[0042] 111: Filament

[0043] 112 Lighting Units

[0044] 114 substrate

[0045] 120 drive element

[0046] 122: First output terminal

[0047] 124: Second output terminal

[0048] 126: Third output terminal

[0049] 130 Current limiting circuit

[0050] 131, 133: Conductive material layer

[0051] 132: Current limiting element

[0052] 134: First conductor

[0053] 136: Second wire

[0054] 140 Dimmer

[0055] 150 Bubble Shell

[0056] 200', 200: lighting fixtures

[0057] 300: Lighting system DETAILED DESCRIPTION

[0058] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0059] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0060] In the present application, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present application.

[0061] The purpose of the present application is to provide an improved lighting unit, lighting device and lighting system, which can realize a deep dimming function with a simple structure and low cost, so as to be suitable for large-scale application.

[0062] In view of this, the present application provides an improved lighting unit 100 , a lighting device 200 including the lighting unit 100 , and a lighting system 300 including the lighting device 200 . Figure 2 Schematic diagram of circuit connection of lighting unit, lighting device and lighting system according to the embodiment of the present application. Figure 2 As shown, the lighting unit 100 according to the present application is connected with a driving element 120 and a dimmer 140, and the lighting unit 100 includes: a light-emitting assembly 110, including a plurality of light-emitting units 112 connected in series; and a current limiting circuit 130, the current limiting circuit 130 includes a current limiting element 132, and the current limiting element 132 is connected in parallel with a portion of the light-emitting units 112 in the plurality of light-emitting units 112. Specifically, the current limiting element 132 is connected in parallel with a predetermined number of light-emitting units 112, and the predetermined number is greater than or equal to 1 and less than the total number of the plurality of light-emitting units 112.

[0063] Accordingly, the present application also provides an improved lighting device 200. The lighting device 200 includes the lighting unit 100 and a driving element 120. The output end of the driving element 120 can be connected to the light emitting component 110.

[0064] The present application also provides an improved lighting system 300. The lighting system 300 includes the lighting device 200 and a dimmer 140. The output end of the dimmer 140 can be connected to the input end of the driving element 120. In addition, the input end of the dimmer 140 can be connected to an AC power source. In the present application, the dimmer 140 is, for example, a phase control dimmer, which adjusts the output voltage by changing the phase of the AC voltage waveform.

[0065] Without the current limiting circuit 130 , when the voltage output from the driving element 120 is less than the overall on-voltage of the plurality of light emitting units 112 , none of the plurality of light emitting units 112 emits light. Therefore, this places requirements on the voltage output from the driving element 120 .

[0066] In particular, when the dimmer 140 performs deep dimming (for example, adjusting the brightness to below 30%), the effective value of the voltage output from the dimmer may be reduced too much, causing the driving element (for example, a linear driver) 120 to be unable to maintain its output voltage higher than the overall conduction voltage of the plurality of light-emitting units 112. At this time, none of the light-emitting units 112 emits light, causing deep dimming of the lighting unit 100 to be actually impossible to achieve.

[0067] In the present application, the added current limiting circuit 130 constitutes a bypass circuit for some of the light emitting units 112 connected in parallel. When the voltage output from the driving element 120 is less than the overall conduction voltage of the plurality of light emitting units 112 but greater than the conduction voltage of the remaining light emitting units 112 except the portion of the light emitting units 112 connected in parallel, the loop formed by the remaining light emitting units 112 and the current limiting circuit 130 will be turned on. At this time, the conduction current depends on the resistance value of the current limiting element 132.

[0068] Therefore, using the above-mentioned lighting unit 100 of the present application, even if the voltage output by the driving element 120 is lower than the overall conduction voltage of the multiple light-emitting units 112 due to the deep dimming performed by the dimmer 140, as long as the voltage output by the driving element 120 is higher than the conduction voltage of the remaining light-emitting units 112 among the multiple light-emitting units 112 except the light-emitting units 112 connected in parallel with the current limiting element 132, the remaining light-emitting units 112 can still emit light.

[0069] Therefore, the lighting unit 100 of the present application can achieve deep dimming while having a simple structure and low cost.

[0070] In the present application, the current limiting element 132 includes, for example, at least one of a resistor, a diode, and a transistor. The current limiting circuit 130 includes the current limiting element 132 and constitutes a bypass circuit connected in parallel with the part of the light emitting units 112 .

[0071] In the present application, the light-emitting unit 112 is, for example, an LED light-emitting unit. Since the LED light-emitting unit has a fixed on-voltage, for example, the red LED is about 1.8V to 2.2V, the green LED is about 2.0V to 3.5V, the blue LED is about 3.0V to 3.5V, and the white LED is about 3.0V to 3.5V. Therefore, by presetting the predetermined number of light-emitting units 112 to be connected in parallel with the current-limiting element 132 (i.e., setting the number of remaining light-emitting units 112), the partial on-voltage of the light-emitting component 110 can be pre-set. In addition, the current size of the remaining light-emitting units 112 when they are turned on can be pre-set by pre-setting the resistance value of the current-limiting element 132, thereby setting the light brightness of the remaining light-emitting units 112 during deep dimming.

[0072] Further, in the present application, in order to realize that the current limiting element 132 is connected in parallel with only a part of the light emitting units 112 among the plurality of light emitting units 112, the light emitting assembly 110 further includes at least one substrate 114, and the plurality of light emitting units 112 are distributed on the at least one substrate 114, such as Figures 3A to 6 When the light emitting assembly 110 includes a plurality of substrates 114 , at least one light emitting unit 112 is disposed on each substrate 114 .

[0073] In addition, in the present application, each substrate 114 and the light-emitting unit 112 arranged on the substrate can form a filament 111. Therefore, the light-emitting component 110 including at least one substrate 114 means that it also includes at least one filament 111. The number of light-emitting units 112 arranged on each filament 111 (or each substrate 114) can be the same or different.

[0074] For example, when the conduction voltage of the LED used is 3.2 V, 22 LED light-emitting units can be arranged on one filament 111, and at this time, the conduction voltage of one filament 111 is about 70 V. If the light-emitting assembly 110 includes two filaments 111, and the lighting unit 100 is provided with a current limiting circuit 130, and the current limiting element 132 of the current limiting circuit 130 is connected in parallel with one filament 111, then when the voltage output from the driving element 120 is between 70 V and 140 V due to the dimming of the dimmer, the light-emitting unit 112 on the other filament 111 that is not connected in parallel with the current limiting element 132 can also emit light.

[0075] Further, in the present application, the number of current limiting circuits 130 is not limited to one, but may also be multiple, thereby providing multiple current limiting elements 132. In addition, the number of current limiting elements 132 in one current limiting circuit 130 is also not limited to one, but may also be multiple. In the case where any of the aforementioned situations leads to multiple current limiting elements 132, the sum of the number of light-emitting units 112 connected in parallel with the multiple current limiting elements 132 is less than the total number of light-emitting units 112 in the lighting unit 100.

[0076] Furthermore, in the case of a plurality of current limiting circuits 130 , the plurality of current limiting circuits 130 may be arranged on the same substrate 114 or (in the case of a plurality of substrates) may be dispersedly arranged on different substrates.

[0077] In the present application, for a current limiting circuit 130, it can be arranged in the following manner: when the light-emitting component 110 includes only one substrate 114, the current limiting circuit 130 is arranged on the substrate 114; and when the light-emitting component 110 includes multiple substrates 114 connected in sequence, the current limiting circuit 130 is arranged on one substrate 114 among the multiple substrates 114 or arranged outside the multiple substrates 114.

[0078] Next, four exemplary embodiments will be used to describe the arrangement of a current limiting circuit 130. The first and second exemplary embodiments describe the case where the current limiting circuit 130 is arranged on the substrate 114, and the third and fourth exemplary embodiments describe the case where the current limiting circuit 130 is arranged outside the substrate 114.

[0079] Figure 3AIt is a schematic diagram of the arrangement of a current limiting circuit in a lighting unit, a lighting device, and a lighting system according to the first exemplary embodiment of the present application.

[0080] In the first exemplary embodiment, the light emitting assembly 110 of the lighting unit 100 includes two filaments 111 . Figure 3A It is shown that a current limiting circuit 130 is arranged on the substrate 114 of one of the filaments 111, and the current limiting element 132 of the current limiting circuit 130 is connected in parallel with part of the light-emitting units 112 on the filament 111. However, the present application is not limited to this, and the light-emitting component 110 also includes three or more filaments 111. In this case, the current limiting element 132 can be connected in parallel with part or all of the light-emitting units 112 on one filament 111. In addition, the light-emitting component 110 can include only one filament 111, in which case the current limiting element 132 is only connected in parallel with part of the light-emitting units 112 on the filament 111. In the first exemplary embodiment, the current limiting element 132 can be a resistor.

[0081] like Figure 3A As shown, the current limiting element 132 includes a resistive material layer coated on a portion of the surface of the substrate 114. A resistive material layer of a predetermined size (e.g., length, width, and height) can be pre-coated on a portion of the surface of the substrate 114 to form a current limiting element 132 with a predetermined resistance value (e.g., 1 kΩ, 100 kΩ, etc.). The coating can be performed using a semiconductor packaging process, such as sputtering or chemical vapor deposition (CVD) method. The resistive material layer can be selected from materials with electrical conductivity, thermal stability, chemical stability, etc., such as carbon-based materials and metal-based materials.

[0082] After coating the resistive material layer, before or after pasting the light emitting unit 112 to the substrate 114, the conductive material layers 131 and 133 may be coated on the surface of the substrate. The conductive material may be a metal such as copper or aluminum. The conductive material layers 131 and 133 are arranged at both ends of the resistive material layer (e.g., both ends along the length direction) and extend outward from both ends of the resistive material layer, so that the two extended ends are respectively in contact with both ends of the part of the light emitting unit 112 to be connected in parallel. Thus, the current limiting circuit 130 is formed.

[0083] Afterwards, the substrate 114 , the current limiting circuit 130 on the substrate 114 , and the light emitting unit 112 may be packaged with a transparent film to form the filament 111 . Figure 3B Shown with Figure 3A Schematic diagram of the appearance of the corresponding lighting device. Figure 3B The lighting device 200 shows a light emitting assembly 110 including two filaments 111 , and the current limiting circuit 130 may be arranged on any of the filaments 111 .

[0084] The current limiting circuit 130 is formed by the coating method, and is embedded in the substrate 114 of the filament 111. Therefore, the current limiting circuit 130 is relatively stable and not easily damaged. In addition, the embedding method of the current limiting circuit 130 does not change the appearance of the filament 111, and thus does not affect the appearance of the lighting device 200.

[0085] Figure 4A It is a schematic diagram of the arrangement of a current limiting circuit in a lighting unit, a lighting device, and a lighting system according to a second exemplary embodiment of the present application.

[0086] In the second exemplary embodiment, the light emitting assembly 110 of the lighting unit 100 includes two filaments 111 . Figure 4A It is shown that a current limiting circuit 130 is arranged on the substrate 114 of one of the filaments 111, and the current limiting element 132 in the current limiting circuit 130 is connected in parallel with some of the light-emitting units 112 on the filament 111. Similar to the description of the first exemplary embodiment, the present application is not limited thereto. The light-emitting assembly 110 also includes three or more filaments 111, and the current limiting element 132 can be connected in parallel with some or all of the light-emitting units 112 on one filament 111. In addition, in the second exemplary embodiment, the current limiting element 132 can include at least one of a resistor, a diode, and a transistor.

[0087] like Figure 4A As shown, the current limiting circuit 130 includes a current limiting element 132, a first wire 134 and a second wire 136, one end of the current limiting element 132 is connected to one end of the partial light-emitting unit 112 to be connected in parallel on the substrate 114 through the first wire 134, and the other end of the current limiting element 132 is connected to the other end of the partial light-emitting unit 112 through the second wire 136.

[0088] The difference from the first exemplary embodiment is that in the second exemplary embodiment, the current limiting circuit 130 is not formed by coating, but is formed by additionally pasting a current limiting element 132 and two wires 134 and 136 on the substrate 114. Thus, the process of forming the current limiting circuit 130 is simple.

[0089] Afterwards, the substrate 114 , the current limiting circuit 130 on the substrate 114 , and the light emitting unit 112 may be packaged with a transparent film to form the filament 111 . Figure 4B Shown with Figure 4A Schematic diagram of the appearance of the corresponding lighting device. Figure 4B The light emitting assembly 110 including two filaments 111 is shown, and the current limiting circuit 130 may be arranged on any of the filaments 111 . Figure 4B The schematic diagram of the lighting device shown in FIG. Figure 3BThat is, similar to the first exemplary embodiment, by additionally pasting the current limiting circuit 130 on the substrate 114 of the filament 111, the appearance of the filament 111 and the appearance of the lighting device 200 are not affected.

[0090] Figure 5 1 is a schematic diagram of the arrangement of a current limiting circuit in a lighting unit, a lighting device, and a lighting system according to a third exemplary embodiment of the present application. In the third exemplary embodiment, the current limiting circuit 130 is arranged outside the substrate 114 and the filament 111. At this time, the light emitting assembly 110 includes at least two filaments 111.

[0091] Figure 5 The light emitting assembly 110 of the lighting unit 100 is shown to include two filaments 111, and a current limiting element 132 connected in parallel with the filaments 111 is arranged outside one of the filaments 111. Similar to the description of the first and second exemplary embodiments, the present application is not limited thereto. The light emitting assembly 110 also includes three or more filaments 111. In addition, in the third exemplary embodiment, the current limiting element 132 may include at least one of a resistor, a diode, and a transistor.

[0092] like Figure 5 As shown, the current limiting circuit 130 includes a current limiting element 132, a first wire 134 and a second wire 136. One end of the current limiting element 132 is connected to one end of a filament 111 through the first wire 134, and the other end of the current limiting element 132 is connected to the other end of the filament 111 through the second wire 136. Thus, the current limiting element 132 is connected in parallel with all the light-emitting units 112 on the filament 111.

[0093] Furthermore, when the light-emitting assembly 110 includes more filaments 111, one end of the current-limiting element 132 can be connected to one end of at least one preset filament 111 through a first wire 134, and the other end of the current-limiting element 132 can be connected to the other end of the at least one preset filament 111 through a second wire 136. Thus, the current-limiting element 132 is connected in parallel with all the light-emitting units 112 on the at least one filament 111.

[0094] By presetting the number of filaments, the number of light-emitting units on each filament, and the position of at least one filament to be connected in parallel, the current-limiting element 132 can be connected in parallel with a predetermined number of light-emitting units 112 in the lighting unit 100 .

[0095] In addition, through Figure 5 The current limiting circuit 130 is arranged in parallel with the current limiting element 132 directly outside the filament, and the current limiting circuit 130 becomes visible in the lighting unit 100. Therefore, it is easy to check whether the current limiting circuit 130 is damaged, and it is easy to replace the current limiting circuit 130.

[0096] Figure 6 1 is a schematic diagram of the arrangement of the current limiting circuit in the lighting unit, lighting device and lighting system according to the fourth exemplary embodiment of the present application. In the fourth exemplary embodiment, the current limiting circuit 130 is arranged outside the substrate 114 and the filament 111. In fact, the current limiting circuit 130 is arranged in the driving element 120. At this time, the light emitting component 110 includes at least two filaments 111. In addition, in the fourth exemplary embodiment, the current limiting element 132 may include at least one of a resistor, a diode, and a transistor.

[0097] like Figure 6 As shown, the driving element 120 includes a first output terminal 122, a second output terminal 124, and a third output terminal 126. The first output terminal 122 is connected to one end of the light emitting component 110, the second output terminal 124 is connected to the other end of the light emitting component 110, and the third output terminal 126 is connected between two predetermined adjacent filaments among the plurality of filaments 111 of the light emitting component 110 (as shown by point A).

[0098] Further, the current limiting circuit 130 includes a current limiting element 132, a first wire 134 and a second wire 136, one end of the current limiting element 132 is connected to the third output terminal 126 through the first wire 134, and the other end of the current limiting element 132 is connected to the second output terminal 124 through the second wire 136. Thus, the current limiting element 132 is connected in parallel with the light emitting unit 112 located between the other end of the light emitting assembly 110 and point A.

[0099] Alternatively, the other end of the current limiting element 132 may also be connected to the first output end 122 instead of the second output end 124 via the second wire 136. Thus, the current limiting element 132 is connected in parallel with the light emitting unit 112 located between the one end of the light emitting assembly 110 and point A.

[0100] By arranging the current limiting circuit 130 in the driving element 120, an improved lighting unit 100 with a simple structure and low cost while being able to achieve deep dimming can be formed without complicated manufacturing processes.

[0101] In addition, in the present application, the lighting device 200 may further include a bulb 150 (eg Figure 5 As shown), it surrounds the lighting unit 100. Further, according to the embodiment of the present application, Figure 5 The lighting device 200 with the bulb shell 150 shown may be called a filament lamp. However, the present application is not limited thereto, and the lighting device 200 may also have other forms of bulb shells (eg, a lampshade of a ceiling lamp), thereby presenting a lamp in any form.

[0102] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0103] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The nouns and pronouns related to people in this patent application are not limited to specific genders.

[0104] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lighting unit connected to a driving element (120) and a dimmer (140), characterized in that: The lighting unit (100) comprises: A light emitting assembly (110) comprising a plurality of light emitting units (112) connected in series; and The current limiting circuit (130) comprises a current limiting element (132), wherein the current limiting element (132) is connected in parallel to a portion of the light emitting units (112) among the plurality of light emitting units (112).

2. The lighting unit according to claim 1, characterized in that: The light-emitting component (110) further comprises at least one substrate (114), and the plurality of light-emitting units (112) are distributed on the at least one substrate.

3. The lighting unit according to claim 2, characterized in that: The light-emitting component (110) comprises only one substrate (114), and the current limiting circuit (130) is arranged on the substrate; or The light-emitting component (110) comprises a plurality of substrates (114) connected in sequence, each of the substrates (114) being arranged with at least one of the light-emitting units, and the current limiting circuit (130) being arranged on one of the plurality of substrates (114) or arranged outside the plurality of substrates (114).

4. The lighting unit according to claim 3, characterized in that: The current limiting circuit (130) is arranged on one of the substrates (114), and the current limiting element comprises a resistive material layer coated on a portion of the surface of the substrate (114).

5. The lighting unit according to claim 4, characterized in that: The current limiting circuit (130) further comprises a conductive material layer (131, 133) coated on the surface of the substrate (114), the conductive material layer (131, 133) being arranged at two ends of the resistive material layer and extending outward from the two ends of the resistive material layer, and the two extended ends of the conductive material layer (131, 133) are respectively in contact with two ends of the portion of the light-emitting unit (112).

6. The lighting unit according to claim 3, characterized in that: The current limiting circuit (130) is arranged on one of the substrates (114), and the current limiting circuit (130) further comprises a first wire (134) and a second wire (136), one end of the current limiting element (132) is connected to one end of the portion of light-emitting units on the substrate via the first wire (134), and the other end of the current limiting element (132) is connected to the other end of the portion of light-emitting units via the second wire (136).

7. The lighting unit according to claim 3, characterized in that: The light emitting assembly (110) comprises a plurality of substrates (114), and the current limiting circuit (130) is arranged outside the plurality of substrates (114). Each of the substrates (114) and at least one of the light-emitting units (112) arranged on the substrate form a filament (111), The current limiting circuit (130) further comprises a first wire (134) and a second wire (136); one end of the current limiting element (132) is connected to one end of at least one preset filament (111) among the plurality of filaments (111) through the first wire (134); and the other end of the current limiting element (132) is connected to the other end of the at least one filament (111) through the second wire (136).

8. The lighting unit according to claim 3, characterized in that: The light emitting assembly (110) comprises a plurality of substrates (114), and the current limiting circuit (130) is arranged outside the plurality of substrates (114). Each of the substrates (114) and at least one of the light-emitting units (112) arranged on the substrate (114) form a filament (111), The driving element (120) comprises a first output end (122), a second output end (124) and a third output end (126), wherein the first output end (122) is connected to one end of the light-emitting component (110), the second output end (124) is connected to the other end of the light-emitting component (110), and the third output end (126) is connected between two predetermined adjacent filaments among the plurality of filaments (111). The current limiting circuit (130) further comprises a first conductive wire (134) and a second conductive wire (136); one end of the current limiting element (132) is connected to the third output end (126) via the first conductive wire (134); and the other end of the current limiting element (132) is connected to the first output end (122) or the second output end (124) via the second conductive wire (136).

9. The lighting unit according to claim 1, characterized in that: The number of the current limiting circuits (130) is multiple, and the sum of the number of the light-emitting units connected in parallel with the multiple current limiting elements included in the multiple current limiting circuits is less than the total number of the light-emitting units in the light-emitting component (110).

10. The lighting unit according to claim 1, characterized in that: The light emitting unit (112) is an LED light emitting unit.

11. The lighting unit according to claim 1, characterized in that: The current limiting element is a resistor, and the current limiting circuit is a resistor circuit.

12. A lighting device connected to a dimmer, characterized in that: The lighting device (200) comprises: The lighting unit according to any one of claims 1 to 11; and The driving element (120), wherein the output end of the driving element (120) is connected to the light-emitting component (110) of the lighting unit (100).

13. The lighting device according to claim 12, characterized in that: The driving element (120) is a linear driving element.

14. A lighting system, characterized in that: The lighting system (300) include: The lighting device according to claim 12 or 13; and The dimmer (140) has an output end connected to an input end of a driving element (120) of the lighting device (200).

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