filament lamp

Abstract

A helical filament lamp comprising: a bundle of two or more filaments. A first portion of the bundle is arranged in a helix or spiral. A second portion of the bundle extends from the first portion and into a space defined by the spiral or helix defined by the first portion.

Description

Technical Field

[0001] This disclosure relates to the field of lighting, and more specifically, to filament lamps. Background Technology

[0002] There is a current desire to improve artificial lighting. Filament lamps (such as incandescent bulbs) are used to provide artificial light in a variety of environments, such as residential, industrial, and / or public settings.

[0003] Currently, filament lamps on the market can be divided into at least three types: spiral, upright, and cross-filament. Spiral filament lamps typically consist of a bundle of one or more filaments arranged to form a spiral or helix structure. Upright filament lamps include multiple filaments that are vertically positioned relative to the lamp holder to which it is attached. Cross-filament lamps include multiple filaments angled within the lamp holder, also angled relative to the lamp holder to which it is attached.

[0004] There is a persistent expectation of the effectiveness of filament lamps. Utility Model Content

[0005] This disclosure is defined by the claims.

[0006] According to an example of one aspect of this disclosure, a spiral filament lamp is provided, comprising: a single bundle of two or more filaments. The bundle of two or more filaments includes: a first portion arranged to form a spiral around a spatial volume; and a second portion configured to extend from the first portion into the spatial volume such that at least some portions of the second portion are located within the spatial volume.

[0007] This disclosure provides a spiral filament lamp having improved uniformity of light intensity distribution based solely on one or more filaments. This eliminates the need for complex and / or expensive designs of optical elements (e.g., bulb covers) to achieve uniform light distribution. More specifically, the average relative luminous intensity of the lamp is improved over a range from 0° to at least 130° from the spiral axis. Extending a second portion into the spatial volume further contributes to improved uniformity of light intensity distribution while providing or maintaining a compact bundle.

[0008] The first part is arranged to form a spiral, or helix, around the spatial volume. Therefore, the first part has a spiral or helical structure. The second part is arranged to enter or surround the spatial volume defined by or around the spiral or helical structure of the first part. This effectively increases the relative amount of light transmitted in directions forming small angles (e.g., <30°) relative to the spiral axis.

[0009] The second portion can be formed as a curved section that initially extends away from the space volume before bending toward and entering the space volume. This provides a method for forming the second portion without causing a sudden or significant change in the orientation of the bundle of two or more filaments, thereby reducing the possibility of breakage or damage to the bundle of two or more filaments during the formation of the second portion.

[0010] The second portion can be configured to extend into the spatial volume no higher than the height of a single turn of the helix. This approach avoids potentially unwanted light emission into the spatial volume (e.g., which could be at least partially absorbed by the first portion defining the volume). This approach also improves light uniformity around a direction perpendicular to the axis of the helix.

[0011] In some examples, the second portion is configured to extend into the spatial volume to a height not less than one-quarter of the height of a single turn of the helix.

[0012] In some examples, the first and second sections together form a continuous bundle of two or more filaments. This improves the reliability of the lamp by reducing the number of potential points of failure. It also improves the uniformity of light output from a bundle of two or more filaments because there are no broken filaments, from which no light is output.

[0013] Optionally, the second portion is formed by a bend in the continuous bundle of the two or more filaments entering the volume, and the spiral is formed around the volume by the first portion.

[0014] In at least one embodiment, the two or more filaments may include four or more filaments.

[0015] Preferably, the two or more filaments are stacked on top of each other. This increases or maximizes the surface area of ​​the light output by the entire beam. Therefore, this method improves the uniformity of the light output by the entire lamp.

[0016] In some examples, in the first section, two or more filaments are stacked in a first direction parallel to the helical axis. This increases the uniformity of light output from the lamp laterally from the first section.

[0017] In some examples, in at least a portion of the second part, two or more filaments are stacked at a non-zero angle relative to the axis of the helix. This method increases the relative amount of light transmitted in directions forming small angles (e.g., <30°) relative to the helix axis because a larger surface area exists facing such small angles from which light is emitted. This improves the overall uniformity of light output by the lamp relative to different angles from the helix axis (e.g., increasing uniformity in the range from 0° to 130° from the helix axis).

[0018] A spiral may include at least two turns.

[0019] In some examples, the maximum width of the spiral is no more than 30 mm.

[0020] In some examples, the maximum pitch of the helix, i.e. the height of any single turn of the helix, is no greater than 25 mm.

[0021] In some examples, the minimum pitch of the helix is ​​not less than 5 mm.

[0022] Optionally, the total height of the spiral shall not be less than 40 mm.

[0023] A method for manufacturing a spiral filament lamp comprising a bundle of two or more filaments is also proposed.

[0024] The method includes: arranging a first portion of the bundle to form a spiral around a spatial volume; and arranging a second portion of the bundle to extend from the first portion into the spatial volume.

[0025] These and other aspects of this disclosure will become apparent and elucidated with reference to one or more embodiments described below. Attached Figure Description

[0026] To better understand this disclosure, and to more clearly illustrate how to implement it, reference will now be made to the accompanying drawings by way of example only, wherein:

[0027] Figure 1 A first view of a spiral filament lamp is shown;

[0028] Figure 2 A second view of a spiral filament lamp is shown;

[0029] Figure 3 A top view of a spiral filament lamp is shown;

[0030] Figure 4 The relative luminous intensity of existing spiral filament lamps is shown within a certain angular range;

[0031] Figure 5The relative luminous intensity of the proposed spiral filament lamp within a certain angular range is shown;

[0032] Figure 6 The label for a spiral filament lamp is shown; and

[0033] Figure 7 This is a flowchart illustrating the proposed method for manufacturing a spiral filament lamp. Detailed Implementation

[0034] This disclosure will be described with reference to the accompanying drawings.

[0035] It should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the apparatuses, systems, and methods, are for illustrative purposes only and are not intended to limit the scope of this disclosure. These and other features, aspects, and advantages of the apparatuses, systems, and methods of this disclosure will become better understood from the following detailed description, the appended claims, and the accompanying drawings. It should be understood that the drawings are merely schematic and not drawn to scale. It should also be understood that the same reference numerals are used throughout the drawings to denote the same or similar parts.

[0036] This disclosure provides a spiral filament lamp. The spiral filament lamp includes a bundle of two or more filaments. A first portion of the bundle is arranged as a spiral or helix. A second portion of the bundle extends from the first portion and enters a space defined by the spiral or helix defined by the first portion.

[0037] The method proposed in this paper is based on the realization that improved uniformity of light output from a spiral filament lamp can be achieved by providing a second portion extending from the spiral-shaped portion of the bundle and entering into the volume, wherein the spiral-shaped portion is formed around the volume. Specifically, the method increases the amount of light output at a relatively small angle (e.g., <30°) relative to the axis around which the spiral-shaped portion is formed. By allowing the second portion to enter into the volume, rather than terminating above or at the volume, light can be ensured to be emitted across the entire range of directions or angles that the light emitted by the spiral-shaped portion cannot directly reach, while still providing a relatively compact bundle of two or more filaments.

[0038] The embodiments can be used to manufacture or produce any suitable spiral filament lamp having any desired shape and / or construction to meet lighting needs or expectations.

[0039] Figures 1 to 3 Various views of a spiral filament lamp 100 according to an embodiment are shown. Figure 1 A first view of light 100 is provided. Figure 2 A second view of lamp 100 is provided. Figure 3A top view of lamp 100 is provided. An optional label for the lamp is "light bulb".

[0040] Lamp 100 comprises a bundle 110 of two or more filaments 121, 122, 123, 124, 125. In the example shown, the bundle is formed by a single bundle of two or more filaments, particularly multiple filaments. A filament is an elongated element that emits light when energized. Examples of filaments include LED filaments (e.g., formed by a string of individual LEDs) or tungsten filaments used to simulate conventional incandescent light bulbs. Preferably, each filament is an LED filament to improve power efficiency and lifespan.

[0041] LED filaments can be formed from LED strings covered or encapsulated with a cover portion or a protective portion. The cover portion can be formed continuously along the LED filament. The cover portion can be formed from a transmissive and / or dispersive material, such as a phosphor-based resin or plastic.

[0042] Bundle 110 is formed into a first part 111 and a second part 112.

[0043] Generally, throughout the document, references to bundle 110 refer to the light-emitting portion or section of bundle 110, excluding, for example, any circuitry used to drive, power, and / or control the bundle.

[0044] The first portion 111 is arranged in a spiral or helical form around the spatial volume 150. Thus, a cylindrical or conical volume is defined, and the first portion 111 is formed as a spiral / helix around the volume 150. Therefore, the volume 150 is defined by the helical shape of the first portion 111.

[0045] The spiral shape of the first section defines the axis X. Preferably, the bundle is configured and / or positioned such that the axis X is aligned with the central axis of the entire lamp. This improves the uniformity of the light distribution of the light output from the lamp 100.

[0046] The first portion 111 can therefore be formed by one or more turns 111A, 111B, 111C. Each turn represents a loop around the spatial volume 150 and the axis X. Thus, the first portion 111 is configured to be wound around the first axis in a series of turns. As shown, the first portion is preferably formed by multiple turns, for example, at least two turns, for example, at least three turns.

[0047] The second portion 112 extends from the first portion, for example, from the virtual or imaginary end 111D of the first portion. The second portion is configured to extend (at least partially) into the spatial volume 150. Thus, at least some of the second portions 112 are located within the spatial volume 150.

[0048] Specifically, the light-emitting portion of the second part is configured to extend at least partially into the spatial volume 150. Therefore, at least some of the light-emitting portions of the second part 112 are located within the spatial volume 150.

[0049] Forming the second portion 112 in this manner results in an increase in the amount and uniformity of light output from the top 100A of the lamp 100, for example at a relatively small angle (e.g., <30°) relative to the axis X of the volume 150. This is because when the second portion moves into the volume 150, one or more portions of the second portion guide light out of the top 100A of the lamp 100.

[0050] Configuring the second part to enter the volume 150 rather than not enter the volume 150 helps ensure that the light emitted by the second part is emitted in the full range of directions or angles that the light emitted by the spiral-shaped part cannot directly reach (e.g., at a relatively small angle relative to the axis X of the volume 150), while still providing a relatively compact bundle of two or more filaments.

[0051] More specifically, and possibly by Figure 2 As best shown, the second portion can be configured to extend into the space volume 150 to a height h of a single turn 111A of the helix. The height of the single turn 111A can alternatively be designated as the pitch, which represents the (average) distance between any two turns of the helix.

[0052] In some examples, the light-emitting portion of the second part can be configured to extend into the spatial volume 150 to a height h of a single turn 111A of the spiral.

[0053] In some examples, the second portion is configured to extend into the spatial volume 150 to a height h not less than that of a single turn 111A of the spiral. Even more specifically, the light-emitting portion of the second portion may be configured to extend into the spatial volume 150 to a height h not less than that of a single turn 111A of the spiral.

[0054] Preferably, the first and second parts together form a continuous bundle of two or more filaments, meaning there is no breakage or separability between the first and second parts. This improves the reliability of the lamp by reducing the number of potential points of failure.

[0055] In the example shown, the first and second portions form separate sections of a single integral bundle of two or more filaments. Therefore, the virtual end 111D of the first portion is the location where the first portion transitions to the second portion along the single integral bundle.

[0056] Conceptually, the second part 112 is connected to and extends from the first part 111. In practice, since the first part 111 and the second part can be formed from a single bundle of integrally formed filaments, the first part 111 and the second part 112 contain different regions or areas of each integrally formed filament.

[0057] In other words, the first and second parts can be inseparable from each other, for example, a bundle that does not break one or more parts. Alternatively, the first and second parts can be formed from a bundle of filaments that are integrally formed (e.g., stacked).

[0058] As an example, if each filament is an LED filament formed by an LED string covered or encapsulated with a cover portion, then when the bundle moves from the first portion 111 to the second portion 112, the cover portion of any filament may not have any breaks or interruptions, i.e., it is formed of a continuous sheet of material.

[0059] As shown in the figure, the second portion 112 may include a bend in a continuous bundle of two or more filaments. The bend causes the second portion to point toward and enter the volume 150 defined or bounded by the first portion 111.

[0060] like Figure 2 As best shown, the second portion 112 can be formed as a curved section that initially extends away from the spatial volume 150 before bending toward and entering the spatial volume 150. Forming the second portion as a curved section provides a good / uniform distribution of light across the angular range emitted from the top 100A of the lamp 100, and reduces the possibility of any potential damage during the formation of the second portion (e.g., by bending), as this avoids sudden changes in direction.

[0061] In a preferred example, two or more filaments are stacked on top of each other. Therefore, a bundle of filaments can comprise a stack of filaments arranged in an N×1 configuration, where N is the number of filaments. Thus, the width of the bundle of filaments can be equal to the width of a single filament, and the height of the bundle of filaments can be N times the height of a single filament.

[0062] This method increases the effective surface area of ​​the light output from a bundle of two or more filaments, thereby increasing the uniformity of the light output from the spiral filament lamp 100.

[0063] Preferably, in the first part, the filament stack is oriented parallel to the helical axis X. Therefore, two or more filaments can be stacked in a first direction parallel to the helical axis X. This method increases the amount and uniformity of light output from the lamp 100, for example, the amount and uniformity of light output at a relatively large angle (e.g., >30°) relative to the axis X of volume 150.

[0064] Preferably, in the second part, the stack of filaments is oriented at a non-zero angle relative to the helical axis X. Therefore, the stack of filaments can be included relative to the axis X. This increases the amount and uniformity of light output from the top 100A of the lamp 100, for example, at a relatively small angle (e.g., <30°) relative to the axis X of the volume 150. Figure 3 This method is perhaps best illustrated here.

[0065] Therefore, these methods increase the overall uniformity and distribution of light across wide / large angles.

[0066] The lamp 100 may also include a spherical encapsulation 191 covering a bundle 110 of two or more filaments. The encapsulation may be formed, for example, of a transparent or translucent material that ensures that illumination from the bundle 110 can diffuse or transmit into the surrounding environment. Therefore, the encapsulation may be formed of a transmissive and / or dispersive material. For example, the material of the encapsulation 191 may be glass or plastic.

[0067] In the illustrated embodiment, package 191 has a pear-shaped cross-section. More specifically, according to IEC / TR60887:2010, package 191 has a shape corresponding to the letter symbol "A". However, in alternative embodiments, package 191 may have a candle-shaped cross-section, a spherical cross-section, a mushroom-shaped cross-section, or any shape suitable for accommodating a bundle 110 of at least two or more filaments.

[0068] In the example shown, lamp 100 also includes a mounting member 192 that provides structural support for other components of the lamp. Therefore, the mounting member is adapted to mechanically support the other components of the lamp.

[0069] The lamp 100 may also include a lamp holder 193. The lamp holder 193 provides means for mounting the lamp 100 to a slot (not shown) on a wall, ceiling, or any other surface. In some embodiments, the lamp holder may include a nut, a pin, and a push cap or bayonet cap. However, embodiments are not limited thereto, and the lamp holder 193 may be any means suitable for fitting the lamp 100 into a lamp receiving slot.

[0070] The first portion 111 of the bundle 110 is closer to the lamp holder 193 than the second portion 112 of the bundle 110. More specifically, the second portion 112 of the bundle is closer to the top 100A of the lamp 100 than the first portion 111 of the bundle 110.

[0071] Lamp 100 may also include a stem 195. The stem provides wires for electrical connection to power two or more filaments 121, 122, 123, 124, 125 of bundle 110. Methods for providing such electrical connection are well known in the art.

[0072] The lamp holder 193 can be suitably configured to facilitate external power supply to the core post 195 (the wires therein). Therefore, the lamp holder may include one or more conductors to provide a power path from outside the lamp 100 to the core post 195.

[0073] Figure 4 and Figure 5 The improved uniformity of light distribution across a wider angular range is demonstrated by the proposed lamp.

[0074] Figure 4 The relative luminous intensity I of an existing spiral filament lamp (i.e., a spiral filament lamp excluding the second part) is shown within a certain angular range. V-R The angle range is defined relative to axis X, where 0° indicates light emitted from the top of lamp 100 along axis X, and 90° indicates light emitted from the side of lamp 100 perpendicular to axis X.

[0075] What is immediately apparent is the extremely low relative luminous intensity at small angles (e.g., <30°). This is because the vast majority of the light emitted by a conventional spiral filament lamp is directed outward or laterally from the axis X, forming a spiral around which a bundle is formed. This can be seen in the larger peaks at approximately 90° angles relative to the axis X.

[0076] Figure 5 The relative luminous intensity of the proposed spiral filament lamp (i.e., the spiral filament lamp including the second part) is shown within a certain angular range. As previously described, the angular range is defined relative to the axis X, where the angle of 0° indicates the light emitted from the top of the lamp 100 along the axis X.

[0077] like Figure 5 As shown, for a spiral filament lamp according to the embodiment presented herein, the amount of light emitted at a relatively low angle (<30°) relative to the axis X is significantly increased. Therefore, the overall uniformity of the light output by the spiral filament lamp is significantly improved.

[0078] The method proposed in this paper for configuring or constructing bundles of two or more filaments thereby increases the uniformity of light output across the angular range of light output.

[0079] More specifically, and as Figure 5 As shown, the luminous intensity value varies by no more than 35% (e.g., no more than 30%) from the average of all measurements in all planes within the 0° to 130° region. This provides a highly uniform light distribution within the 0° to 130° region.

[0080] Figure 6 Labels of various sizes and their features, including optional features, are provided for lamp 100.

[0081] The helix formed by the first part of the bundle has a total height h. helix The total height of the spiral is preferably not less than 40 mm, for example, not less than 45 mm. However, those skilled in the art will understand that the height of the spiral can depend on the desired height of the entire lamp, and can vary depending on the specific application of the lamp.

[0082] The helix formed by the first part of the bundle has a width W helix The width of the helix is ​​preferably not less than 20 mm, for example, not less than 25 mm. However, those skilled in the art will understand that the width W of the helix... helix It can depend on the desired width of the entire lamp, which can vary depending on the specific use of the lamp.

[0083] As previously described, each turn of the helix formed by the first part has a defined height h. The height of each turn of the helix represents the pitch of the helix. Preferably, the maximum pitch of the helix is ​​not greater than 25 mm, that is, preferably, the maximum height of each turn is not greater than 25 mm. Preferably, the minimum height of each turn is not less than 5 mm.

[0084] The distance between the bulb package 191 and the second part of the bundle is the distance d from the bundle to the bulb. b-b Preferably, the distance is not less than 5 mm. This helps to improve the dispersion of light from the second part of the beam, thereby improving the uniformity of light across a wide angular range relative to the helical axis.

[0085] The bulb package 191 has a diameter Φ bulb This effectively represents the width of the bulb enclosure at its thickest / maximum point relative to an axis perpendicular to the height of the measuring lamp, for example, an axis perpendicular to the spiral axis.

[0086] The height of the lamp is measured as the longest distance or dimension of the entire lamp, from the bottom of the lamp holder to the top of the lamp or bulb housing, for example parallel to the helical axis, and preferably aligned with the helical axis.

[0087] As explained above, the specific dimensions of all the features of a lamp will depend on the lamp's intended use case scenario, such as meeting predetermined guidelines or standards.

[0088] As a working example, the following dimensions can be used for lamp 100 designed to meet the standard A60 lamp, for example, as described in the IEC / TR60887:2010 standard: h helix =49mm; W helix =26.3mm; h=11.5mm; d b-b =6mm; Φ bulb =60mm; and b height =108mm.

[0089] As another working example, the following dimensions can be used for lamps designed to provide standard G95 lamps: h helix =64mm; W helix =26.3mm; h=18mm; d b-b =15mm; Φ bulb =95mm; and b height =140mm.

[0090] As another working example, the following dimensions can be used for lamps designed to provide standard G125 lamps: h helix =64mm; W helix =26.3mm; h=18mm; d b-b =28.2mm; Φ bulb =125mm; and b height =178mm.

[0091] As another working example, the following dimensions can be used for lamps designed to provide standard ST64 lamps: h helix =64mm; W helix =26.3mm; h=18mm; d b-b =15.7mm; Φ bulb =64mm; and b height =140mm.

[0092] Naturally, the shape of the bulb package 191 will be appropriately modified or changed to match the desired standard for the lamp. The bulb package shape for a given bulb type (e.g., A60, G95, or ST64) is defined by a letter prefix in the bulb type, as described in the IEC / TR60887:2010 standard. The numbers in the bulb type define the diameter / width of the bulb housing, as also described in the IEC / TR60887:2010 standard.

[0093] Figure 7 This is a flowchart illustrating a method for manufacturing a spiral filament lamp comprising a bundle of two or more filaments.

[0094] Method 700 includes step 710 of arranging a first portion of the bundle to form a spiral around a spatial volume.

[0095] Method 700 also includes step 720 of arranging a second portion of the bundle to extend from the first portion and into the spatial volume.

[0096] Those skilled in the art can readily modify method 700 to produce any spiral filament lamp disclosed herein, for example, by providing additional steps to define other features of the spiral filament lamp, if necessary. Method 700 can be integrated into existing lamp manufacturing techniques, for example, replacing or supplementing prior methods that provide or define bundles of two or more filaments for a spiral filament lamp.

[0097] By studying the accompanying drawings, the disclosure, and the appended claims, those skilled in the art can understand and implement variations of the disclosed embodiments in practicing the claimed disclosure. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality.

[0098] The fact that certain measures are described in mutually different dependent claims does not imply that combinations of these measures cannot be used advantageously.

[0099] If the term “suitable” is used in the claims or description, it should be noted that the term “suitable” is intended to be equivalent to the term “configured as.” If the term “arrangement” is used in the claims or description, it should be noted that the term “arrangement” is intended to be equivalent to the term “system,” and vice versa.

[0100] Any reference numerals in the claims should not be construed as limiting the scope.

Claims

1. A spiral filament lamp (100), characterized in that, include: A single bundle (110) of two or more filaments (121, 122, 123, 124, 125), said bundle of two or more filaments comprising: The first part (111) is arranged to form a spiral around the spatial volume; and The second part (112) is configured to extend from the first part into the spatial volume such that at least some portions of the second part are located within the spatial volume; The first part and the second part together form a continuous bundle of two or more filaments; The light-emitting portion of the second part is configured to extend to a height (h) of a single turn (111A) of the spiral within the spatial volume.

2. The spiral filament lamp according to claim 1, characterized in that, The second portion is formed as a curve that initially extends away from the space volume before bending toward and entering the space volume.

3. The spiral filament lamp according to claim 1, characterized in that, The second portion is configured to extend into the space volume to a height (h) of not less than one-quarter of the height of a single turn (111A) of the spiral.

4. The spiral filament lamp according to claim 1, characterized in that, The second portion is formed by bending the continuous bundle of the two or more filaments in the volume, and the spiral is formed around the volume by the first portion.

5. The spiral filament lamp according to claim 1, characterized in that, The two or more filaments include four or more filaments.

6. The spiral filament lamp according to claim 1, characterized in that, The two or more filaments are stacked on top of each other.

7. The spiral filament lamp according to claim 6, characterized in that, In the first part, the two or more filaments are stacked in a first direction parallel to the axis (X) of the helix.

8. The spiral filament lamp according to claim 7, characterized in that, In at least a portion of the second part, the two or more filaments are stacked at a non-zero angle relative to the axis (X) of the spiral.

9. The spiral filament lamp according to any one of claims 1 to 7, characterized in that, The spiral comprises at least two turns.

10. The spiral filament lamp according to any one of claims 1 to 7, characterized in that, The maximum pitch of the helix is ​​no greater than 25 mm, and the maximum pitch is the height (h) of any single turn of the helix.

11. The spiral filament lamp according to any one of claims 1 to 7, characterized in that, The minimum pitch of the helix is ​​not less than 5 mm, and the minimum pitch is the height (h) of any single turn of the helix.

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