JP6410033B2 - Lamp device - Google PatentsLamp device Download PDF
- Publication number
- JP6410033B2 JP6410033B2 JP2014233058A JP2014233058A JP6410033B2 JP 6410033 B2 JP6410033 B2 JP 6410033B2 JP 2014233058 A JP2014233058 A JP 2014233058A JP 2014233058 A JP2014233058 A JP 2014233058A JP 6410033 B2 JP6410033 B2 JP 6410033B2
- Prior art keywords
- light guide
- light emitting
- end side
- guide column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Embodiments described herein relate generally to a lamp device using a light guide column.
Conventionally, there is an incandescent clear light bulb that uses a transparent glass globe and allows the filament to be seen directly. When this incandescent clear light bulb is lit, strong light is emitted from the filament that can be seen directly through the globe, so that a glittering feeling can be obtained and a lighting effect can be obtained.
There is also a lamp device that uses a light emitting element as a light source and uses a transparent globe and can be replaced with an incandescent clear bulb. In this lamp device, light from the light emitting element is emitted into the globe by a lens, or a light emitting module having a plurality of light emitting elements is arranged in the inner space of the globe.
However, with a lamp device using a transparent globe, it has been difficult to reproduce the glittering feeling that an incandescent clear light bulb is lit. Therefore, there has been a problem in the adaptability of the lamp device to a lighting device such as a chandelier or a lighting device for a store for which an incandescent clear light bulb capable of obtaining a sparkle is suitable.
The problem to be solved by the present invention is to provide a lamp device that can reproduce the glittering feeling that an incandescent clear light bulb is lit, and can improve the adaptability to a lighting device.
The lamp device of the embodiment includes a housing, a light emitting module , a transparent globe, a light guide, and a power feeding unit. Emitting module have a light emitting portion disposed at one end of the housing. The globe is disposed on one end side of the housing so as to cover the light emitting portion. The light guide has a light guide pillars. One end side of the light guide column is disposed at the center of the maximum outer diameter portion of the globe, and the end surface on the other end side of the light guide column is disposed to face the light emitting unit. To have a function of changing the direction of the light to the one end face of the light guide pillar. The power feeding unit is disposed on the other end side of the housing. The size of the light emitting portion is smaller than the size of the end face on the other end side of the light guide column. The light emitting module includes a substrate, a plurality of light emitting elements mounted on the substrate, a frame portion surrounding the light emitting elements, and a fluorescent material whose surface is filled as the light emitting element and covers the light emitting element. It has a body layer, and the surface of the phosphor layer is recessed from the frame part.
According to the present invention, it is possible to reproduce the glittering feeling as if the incandescent clear light bulb is lit, and to improve the adaptability to the lighting device.
Hereinafter, an embodiment will be described with reference to FIGS. 1 to 13.
1 to 3 show a lamp device 10 as a light emitting device. The lamp device 10 is a light bulb shaped lamp that can be used by being mounted on a socket for an incandescent light bulb for general illumination.
The lamp device 10 includes a housing 11. A light emitting module 12, a light guide 13, a cover 14, and a globe 15 as a transparent member are disposed on one end side of the housing 11, and a case 16 and a power supply unit 17 are disposed on the other end side of the housing 11. And the electric power feeding part 18 is arrange | positioned. The lamp device 10 has an imaginary lamp axis (center axis) z extending from the globe 15 to the power supply unit 18, and the globe 15 side of the lamp axis z is referred to as one end side, and the power supply unit 18 side is referred to as the other end side. .
The housing 11 is made of a metal material. For example, the housing 11 is made of aluminum die casting. The housing 11 includes a cylindrical outer peripheral portion 21 and an attachment portion 22 formed on one end side of the outer peripheral portion 21. The other end side of the housing 11 is hollow. The outer peripheral portion 21 is formed in a cylindrical shape having a large diameter on one end side, a small diameter on the other end side, and a diameter decreasing from the one end side toward the other end side.
A surface on one end side of the attachment portion 22 is configured as a planar attachment surface to which the light emitting module 12 is attached. The mounting portion 22 has a plurality of mounting holes 23 for screwing the light emitting module 12, a plurality of mounting holes 24 for screwing the case 16, and a wiring for electrically connecting the light emitting module 12 and the power source portion 17. Wiring holes 25 are formed for passing through. Further, a pair of recesses 26 are formed on the surface on one end side of the attachment portion 22 at a symmetrical position with respect to the center of the attachment portion 22. A groove-shaped escape portion 27 is formed around the attachment portion 22.
Between the outer peripheral portion 21 and the attachment portion 22, an attachment groove 28 for inserting and attaching the globe 15 from one end side of the housing 11 is formed.
The light emitting module 12 is a COB (Chip On Board) module in this embodiment. As shown in FIG. 6, the light emitting module 12 includes a substrate 30, a plurality of light emitting elements 31 mounted on the substrate 30, a frame portion 32 surrounding the periphery of the light emitting elements 31, and the light emitting elements 31 in the frame portion 32. A phosphor layer 33 filled to cover (seal) is provided.
The substrate 30 has a flat plate shape, and a wiring pattern for electrically connecting the plurality of light emitting elements 31 is formed on the surface on one end side. The substrate 30 is made of an insulating material or a metal material. When the substrate 30 is a metal material, an insulating film is formed on the surface of the substrate 30, and a wiring pattern is formed on the insulating film. The surface of the phosphor layer 33 is configured as the light emitting unit 34. The light emitting unit 34 is disposed at the center of the surface on one end side of the substrate 30, and the connector 35 is disposed on the periphery of the surface on one end side of the substrate 30. The connector 35 is electrically connected to the wiring pattern.
The board 30 is provided with a mounting hole 36 and a plurality of mounting grooves 37 for screwing and fixing to the mounting hole 23 of the housing 11, and wiring for electrically connecting the connector 35 of the light emitting module 12 and the power supply unit 17. Wiring grooves 38 are respectively formed. Further, a pair of insertion holes 39 are formed in the substrate 30 at symmetrical positions with the light emitting portion 34 as the center. The pair of insertion holes 39 corresponds to the positions of the pair of recess portions 26 of the housing 11. The substrate 30 is fastened and fixed to the housing 11 by a plurality of screws, and is thermally coupled to the housing 11.
The light emitting element 31 is an LED. A blue light emitting LED is used as the LED.
The frame portion 32 is formed in an annular shape from an insulating material.
The phosphor layer 33 contains a phosphor that is excited by the light of the light emitting element 31 in a transparent resin. For example, it contains a yellow phosphor that emits yellow light when excited by the blue light of a blue light emitting LED. Then, white light is emitted from the light emitting portion 34 which is the surface of the phosphor layer 33. Further, the surface of the phosphor layer 33 is recessed from the frame portion 32. That is, the height of the phosphor layer 33 from the substrate 30 is lower than the height of the frame portion 32 from the substrate 30. The surface of the phosphor layer 33 is the lowest at the center, the peripheral part in contact with the frame part 32 is high, and is formed in a concave shape.
The light emitting unit 34 may be formed of an SMD (Surface Mount Device) package using LEDs, or an organic EL other than LEDs.
Moreover, as shown in FIGS. 1 and 2, the light guide 13 is formed of a transparent resin or glass. In the case of resin, for example, acrylic resin is used. The light guide 13 includes a light guide column 42 and a fixing portion 43 for attaching the light guide column 42 to the housing 11.
The light guide column 42 is formed in a cylindrical shape, one end side of the light guide column 42 is disposed at the center of the maximum outer diameter portion D of the globe 15, and the end surface on the other end side of the light guide column 42 is disposed to face the light emitting unit 34. .
A recess 44 is formed in the central region of the end face on one end side of the light guide column 42, and a reflective film 45 is formed on the inner surface of the recess 44. The concave portion 44 has a deepest depth from the end surface on one end side of the light guide column 42 in the center, and a curved portion or an inclined surface is formed from the deepest portion to the end surface on one end side of the light guide column 42. The reflection film 45 may be either a total reflection film that totally reflects light or a transflective film that transmits part of the light and reflects part of the light. In some cases, the reflective film 45 may be omitted. In the present embodiment, for example, an aluminum vapor deposition film that is a total reflection film is used as the reflection film 45. Note that the reflection film 45 is not formed on the end face on one end side of the light guide column 42 excluding the recess 44. Therefore, the light guided to this end face is transmitted to one end side of the light guide column 42, and the light distribution characteristic can be improved.
The end surface on the other end side of the light guide column 42 is configured as an incident surface 46 on which light emitted from the light emitting unit 34 enters the light guide column 42. Light that has entered the light guide column 42 from the incident surface 46 is guided through the light guide column 42 toward one end of the light guide column 42. One end side of the light guide column 42 is configured as a light radiating portion 47 that radiates light guided in the light guide column 42 to the outside of the light guide column 42. In the light emitting portion 47, a part of the light guided in the light guide column 42 is reflected by the reflection film 45 and emitted from the peripheral surface of the light guide column 42 or the end surface on one end side of the light guide column 42. A part of the light guided in 42 is directly emitted from the front end surface 48 which is an end surface on one end side of the light guide column 42. Therefore, the light radiating portion 47 is configured on one end side of the light guide column 42 provided with the concave portion 44 and the reflective film 45. From the light radiating portion 47, the lateral direction intersecting the axial direction of the light guide column 42, Light is emitted in a wide direction including a distal direction, an oblique direction from the light guide column 42 toward the housing 11 side. The light emitting portion 47 is disposed at the center of the maximum outer diameter portion D of the globe 15. And the glittering feeling that the incandescent clear light bulb is lit can be reproduced by the light emitted from the light emitting part 47.
The fixing portion 43 protrudes from two locations on the peripheral surface on the other end side of the light guide column 42 in directions opposite to each other. Each fixing portion 43 includes a continuous portion 49 continuous with the light guide column 42 and a protrusion 50 provided at the tip of the continuous portion 49. The thickness of the continuous portion 49 is smaller than the thickness of the protruding portion 50, and the width of the continuous portion 49 is smaller than the diameter of the light guide column 42.
A protrusion 51 to be coupled to the cover 14 protrudes from a surface on one end side of the protrusion 50, and a protrusion 52 to be positioned by being inserted into the insertion hole 39 of the substrate 30 on the surface of the other end of the protrusion 50. Projected. The tip of the protrusion 52 is configured to enter the hollow portion 26 of the housing 11 and not come into contact with the housing 11. Therefore, the light guide 13 and the substrate 30 are reliably positioned, whereby the light emitting unit 34 and the incident surface 46 of the light guide column 42 are positioned. The fixing portion 43 of the light guide 13 is sandwiched and fixed between the substrate 30 and the cover 14.
The cover 14 is made of an insulating resin material. The cover 14 is formed in a curved shape whose center protrudes toward one end side, and covers one end side of the housing 11 and the other end side of the light emitting module 12 and the light guide column 42. An insertion hole 55 through which the light guide column 42 is inserted is formed in the center of the cover 14. A plurality of claws 56 that are caught on the surface of the other end surface of the substrate 30 are provided on the periphery of the cover 14. The cover 14 is fixed to the substrate 30 in a state where the fixing portion 43 of the light guide 13 is sandwiched between the substrate 30 and the cover 14 by the claw 56 being caught on the surface on the other end side of the substrate 30. The claw 56 is disposed in the escape portion 27 of the housing 11. On the inner surface of the cover 14, a cylindrical holding portion 57 into which the protrusion 51 of the fixing portion is fitted is formed.
The globe 15 is made of a transparent material having a light transmittance of 95% or more. Glass or resin is used as the transparent material. The globe 15 is hollow and has a spherical portion 60 formed on one end side, a reduced diameter portion 61 whose diameter is reduced from one end side to the other end side, and the other end side opened. On the other end side of the globe 15, an opening edge 62 is formed which is inserted into the mounting groove 28 of the housing 11 and is bonded and fixed with, for example, a silicone adhesive. A light emitting portion 47 is disposed at the center of the maximum outer diameter portion D of the spherical portion 60 of the globe 15.
The case 16 is formed in a cylindrical shape from a resin material having an insulating property. One end of the case 16 is inserted into the cavity of the housing 11, and a screw that passes through the mounting hole 24 of the housing 11 is screwed to one end of the case 16, so that the case 16 is fixed to the housing 11. A power feeding unit 18 is attached to the other end side of the case 16. A pair of substrate holding portions 65 are formed along the lamp axis z at two opposing locations inside the case 16.
Further, the power supply unit 17 converts AC power input from the power supply unit 18 into predetermined DC power and supplies the converted DC power to the light emitting element 31 of the light emitting module 12. The power supply unit 17 includes a circuit board 68 and a plurality of electronic components 69 mounted on the circuit board 68. The circuit board 68 is inserted between the pair of board holding portions 65 from one end side of the casing 11 and is held by the casing 11. A pair of AC power input portions of the power supply unit 17 are electrically connected to the power feeding unit 18 by wiring, and a pair of DC power output units of the power supply unit 17 are electrically connected to the connector 35 of the light emitting module 12 by wiring. It is connected.
In addition, the power supply unit 18 uses a base that can be connected to a socket for general illumination incandescent bulbs such as E26 and E17. The power supply unit 18 is not limited to the base, and may be a pair of pins depending on the lamp type.
In the lamp device 10, the ratio of the region of the globe 15 to the entire length of the lamp in the direction of the lamp axis z is 55% or more, preferably 60% or more.
And the effect | action of this embodiment is demonstrated.
The lamp device 10 is used by connecting the power feeding portion 18 to a socket for an incandescent light bulb for general illumination of the lighting device. When AC power is supplied to the lamp device 10 through the socket, the power supply unit 17 converts the AC power into predetermined DC power and supplies it to the light emitting element 31. As a result, the light emitting element 31 emits light, and light is emitted from the light emitting unit 34.
The light emitted from the light emitting unit 34 enters the light guide column 42 from the incident surface 46 and is guided toward the light emitting unit 47 through the light guide column 42. The light guided to the light emitting portion 47 is reflected by the reflective film 45 of the recess 44 and emitted from the peripheral surface of the light guide column 42 or the end surface on one end side of the light guide column 42, and on the one end side of the light guide column 42. The light is emitted directly from the tip surface 48 which is the end surface. Therefore, light is emitted from the light emitting portion 47 in a wide direction including a lateral direction intersecting the axial direction of the light guide column 42, a tip direction of the light guide column 42, and an oblique direction from the light guide column 42 toward the housing 11 side. Radiated. The light emitted from the light emitting unit 47 passes through the globe 15 and is irradiated onto the illumination space.
The lamp device 10 can reproduce the glittering feeling that the incandescent clear light bulb is lit by radiating light from the light emitting portion 47 of the light guide column 42.
Since the light emitting portion 47 is disposed at the center of the maximum outer diameter portion D of the globe 15, the light emitted from the light emitting portion 47 in the radiation direction enters the globe 15 perpendicularly and easily passes through the globe 15. Since the reflection of unnecessary light on the inner surface of the globe 15 is suppressed, the feeling of glitter can be improved and the light extraction efficiency to the outside of the globe 15 can be improved.
If the lamp device 10 is configured to have a size approximating that of an incandescent bulb for general illumination, the length of the light guide column 42 required to arrange the light emitting portion 47 at the center of the maximum outer diameter portion D of the globe 15 is 35 to 35. It is in the range of 45 mm.
Moreover, the diameter d of the light guide column 42 is in the range of 2 to 9 mm. If the diameter d of the light guide column 42 is smaller than 2 mm, the light of the light emitting section 34 is difficult to enter the light guide column 42 and the efficiency is reduced. If the diameter d of the light guide column 42 is larger than 9 mm, the light emitting section 47 Increases and the feeling of glittering decreases.
As shown in FIG. 4, the opening diameter (the diameter of the widest opening portion) a of the recess 44 of the light guide column 42 is in the range of 80 to 95% of the diameter d of the light guide column 42. If it is smaller than 80%, the light in the lateral direction of the light guide column 42 or in the oblique direction from the light guide column 42 toward the housing 11 decreases, and if it is greater than 95%, the front end surface 48 of the light guide column 42 is reduced. And the light emitted from the tip surface 48 is reduced. Here, the light distribution when the diameter d of the light guide column 42 is 6 mm, the opening diameter a of the recess 44 is 4.9 mm, and the ratio of the diameter d of the light guide column 42 to the opening diameter a of the recess 44 of the light guide column 42 is 82%. The distribution is shown in FIG. As can be seen from FIG. 5, the light distribution angle was about 300 °, and a wide light distribution equivalent to an incandescent clear bulb was obtained. In this case, the depth b of the recess 44 is 2.1 mm, and the ratio of the depth b of the recess 44 to the opening diameter a of the recess 44 is 43%.
Further, as shown in FIG. 4, the depth b of the recess 44 of the light guide column 42 is in the range of 30 to 70% with respect to the opening diameter a of the recess 44. Since the depth b of the concave portion 44 is in the range of 30 to 70% with respect to the opening diameter a of the concave portion 44, light emitted from the light emitting portion 47 can be transmitted laterally from the light guide column 42 or from the light guide column 42 to the housing 11. The light can be reflected in an oblique direction toward the side, and a well-balanced light distribution characteristic like an incandescent clear light bulb can be obtained. That is, when the depth b of the recess 44 is smaller than 30% with respect to the opening diameter a of the recess 44, the light reflected in the lateral direction of the light guide column 42 decreases, and the depth b of the recess 44 decreases. If it is larger than 70% with respect to the opening diameter a, light reflected in an oblique direction from the light guide column 42 toward the housing 11 is reduced. As the light reflected in the lateral direction of the light guide column 42 decreases or the light reflected in the oblique direction from the light guide column 42 toward the housing 11 decreases, the orientation distribution is biased and the incandescent clear bulb This makes it difficult to reproduce the sparkle.
In addition, as shown in FIG. 6, the size of the incident surface 46 that is the end surface on the other end side of the light guide column 42 is larger than the size of the light emitting portion 34. Therefore, most of the light radiated from the light emitting unit 34 can be incident on the light guide column 42 to reduce the leakage light, thereby increasing the light radiated from the light radiating unit 47 and improving the glittering feeling.
An air layer 72 is formed between the incident surface 46 of the light guide column 42 and the light emitting unit 34. When there is no air layer 72, that is, when the incident surface 46 and the light emitting unit 34 are in close contact, a part of the light incident on the light guide column 42 from the light emitting unit 34 is not guided to one end side of the light guide column 42. The light is easily emitted from the peripheral surface of the light guide column 42. When there is an air layer 72, refraction occurs when light emitted from the light emitting unit 34 enters the light guide column 42 through the air layer 72, and the refracted light is guided through the light guide column 42 toward the light emitting unit 47. Is done.
The gap of the air layer 72 between the incident surface 46 of the light guide column 42 and the light emitting unit 34 has a great effect on the efficiency. As shown in FIG. 7, when the gap of the air layer 72 is wide, the incident loss from the light emitting portion 34 to the incident surface 46 increases, and the efficiency decreases. As a comparative example of the loss, a loss at the fixing portion 43 of the light guide 13, a loss at the reflective film 45, and other losses are shown, but it can be seen that the gap of the air layer 72 has a large effect on the efficiency. Therefore, it is preferable that the light guide column 42 and the light emitting unit 34 be as close as possible so that the gap between the air layers 72 is as small as possible. By the way, when the light guide column 42 is brought close to the light emitting unit 34, the light guide column 42 may come into contact with the light emitting unit 34 and affect the light emitting unit 34. In the present embodiment, since the surface of the phosphor layer 33 that is the light emitting portion 34 is recessed from the frame portion 32, even if the light guide column 42 abuts on the frame portion 32, the light guide column 42 does not contact the phosphor layer 33. There is no contact. Therefore, it is possible to prevent the light emitting part 34 from being affected while bringing the light guide column 42 and the light emitting part 34 as close as possible.
Further, the fixing portion 43 of the light guide 13 protrudes from two places on the peripheral surface on the other end side of the light guide column 42. A part of the light incident on the light guide column 42 from the incident surface 46 leaks to the fixing portion 43 connected to the light guide column 42, and the efficiency is lowered. By fixing the fixing portion 43 of the light guide 13 from two locations on the peripheral surface on the other end side of the light guide column 42, for example, the fixed portion protrudes from the entire peripheral surface on the other end side of the light guide column 42. Compared with the case, leakage light can be reduced, thereby increasing the light emitted from the light emitting portion 47 and improving the feeling of glitter.
Moreover, the fixed portion 43 includes a continuous portion 49 that is continuous with the light guide column 42, and a protruding portion 50 that is provided at the tip of the continuous portion 49, but the thickness of the continuous portion 49 is thinner than the thickness of the protruding portion 50, Since the width of the continuous portion 49 is smaller than the diameter of the light guide column 42, light leakage to the fixing portion 43 is prevented while securing the strength of the fixing portion 43 for fixing the light guide 13 to the housing 11. Can be reduced.
Further, since the cover 14 covers the other end side of the light emitting unit 34 and the light guide column 42, light is prevented from being emitted from the vicinity of the housing 11, and light is emitted only from the light emitting unit 47. Can improve the feeling of glitter.
Next, the glittering feeling will be described.
The sense of glitter is used to mean that the light appears to shine beautifully.
Here, the light source there is a sense of glitter, is apparent sizes when "the average luminance is 5000 cd / m 2 (preferably 45000cd / m 2) away 10m from or more and a light source (light emitting portion 47) 0. Defined as “a light source having an average luminance of 5000 cd / m 2 (preferably 45000 cd / m 2 ) or more and a size of 64 mm 2 (preferably 17 mm 2 )” or less. In addition, if it sets to the preferable numerical value, possibility that the glittering feeling more than an incandescent clear light bulb will be acquired is high. The reasons are shown in (1) and (2).
(1) Incandescent clear light bulbs are said to have a sparkle when used in atmosphere-oriented scenes such as in stores, but they are said to be very dazzling when used in office-oriented situations. ing. Therefore, the luminance condition of the light source was set as the luminance at which glittering feeling can be obtained = luminance at which glare is felt.
As a result of calculation using Expression 1 for quantifying the glare in direct viewing, the average brightness that feels glare is 5000 cd / m 2 (refer to FIG. 8 when nUGR D = 13), and the average brightness that feels brightly is 45000 cd. / M 2 (when nUGR D = 31, refer to FIG. 8). Therefore, conditions 5000 cd / m 2 in average luminance, preferably has a 45000cd / m 2.
Note that these average luminances can be defined by measurement results within a range of an effective light distribution angle of the lamp device 10 (in the present embodiment, 300 ° shown in FIG. 5).
Average luminance L S of the light source, average luminance of the background (average luminance around the light source) L b , size of the light source ω, luminance distribution of the light source (average luminance / maximum luminance) U, degree of glare (see FIG. 8) nUGR D. In addition, the calculation conditions are L b = 30 cd / m 2 , ω = 0.0001 sr, and U = 1.0.
As shown in FIG. 9, the average luminance of the light source is obtained feeling sparkle at 5000 cd / m 2 or more regions A1, resulting feeling glitter or more incandescent clear bulb average luminance of the light source in 45000cd / m 2 or more regions A2 It is done.
(2) When looking directly at the light source, a light beam (a line of light spreading on the radiation) is seen, and a light beam with a narrower light line is said to be a light source with a glittering feeling.
Since the light beam spreads radially as the light source is smaller, a light source with a glittering feeling can be realized by making the light source smaller than a predetermined size. Therefore, the predetermined size is determined here as follows.
In general, the apparent size of an incandescent clear light bulb, which is said to be a light source with glitter, is observed from a distance of 10 m. Its size is “0.000001 sr or less”. Hereinafter, this is referred to as a reference apparent size.
The actual size of the light source was set so as to be the reference apparent size when the light source was observed from a distance of 10 m. The actual size of the light source is 64 mm 2 . Note that a 64 mm 2 light source has a diameter of 9 mm if it is circular or spherical, and a side of 8 mm if it is square or cubic. The size described here is the size of a surface perpendicular to the line-of-sight direction (see FIG. 12).
Moreover, it is preferable that the apparent size when the size of the actual light source is observed from a distance of 5 m is 0.000001 sr or less. In this case, the actual light source size is 17 mm 2 . A light source having a size of 17 mm 2 has a diameter of 4.6 mm if it is circular or spherical, and has a side length of 4.1 mm if it is square or cubic.
In addition, what is necessary is just to define by the angle used as the maximum magnitude | size, when the apparent magnitude | size of a light source changes with viewing angles. In the case of the present embodiment, the apparent area is the largest at 0 ° shown in FIG. 5 and the illuminance (light flux) is also large, but these are the maximum values when horizontal (± 90 °). Also good.
As shown in FIG. 10, a glittering feeling is obtained in the area A3 where the size of the light source is 64 mm 2 or less, and a glittering feeling more than that of the incandescent clear bulb is obtained in the area A4 where the size of the light source is 17 mm 2 or less.
The light emitting portion 47 of the lamp device 10 of this embodiment, "light source average luminance 5000 cd / m 2 (preferably 45000cd / m 2) or more and the apparent size is less than 0.000001sr", or , “A light source having an average luminance of 5000 cd / m 2 (preferably 45000 cd / m 2 ) or more and a size of 64 mm 2 (preferably 17 mm 2 ) or less”.
It should be noted that the size of the light source is preferably 30 mm 2 or less in order to feel more glitter than the comparative example. The comparative example is a lamp device in which a light emitting module including a plurality of light emitting elements is arranged in an inner space of a globe.
FIG. 11 is a graph showing the most preferable range of the relationship between the size of the light source and the luminance of the light source. The range shown in FIG. 11 shows the size of the light source that makes the glittering feeling stand out more than the comparative example, and the manufacturability of the light source (light emitting portion 47) is relatively easy. 9 to 17 mm 2 . In this graph, when the size of the light source is 17 mm 2 , the average luminance is 45000 cd / m 2 or more, and when the size of the light source is 9 mm 2 , the glittering feeling is conspicuous when the average luminance is 77000 cd / m 2 or more. Further, when the average luminance is 2800000 cd / m 2 when the size of the light source is 17 mm 2 , it is necessary to make it less than this because it feels glare like an incandescent bulb. When the size of the light source is 9 mm 2 , The average luminance is preferably 480,000 cd / m 2 or less.
FIG. 13 shows the relationship between the actual light source size and average luminance. In FIG. 13, ● is an incandescent clear light bulb, ○ is a comparative example, and ◎ is the lamp device 10 of the embodiment. As can be seen from FIG. 13, the lamp device 10 of the present embodiment is in a region A4 where a glittering feeling is obtained as compared with the comparative example. Moreover, even if compared with an incandescent clear light bulb, it is in an area A4 where a glittering feeling equal to or higher than that can be obtained.
In response to this result, the prototype of the lamp device 10 of the embodiment was actually made, and when dozens of subjects asked which of these three light sources had the most sparkling feeling, more than 80 to 90% of subjects The answer that the lamp device 10 of the embodiment has the most sparkling feeling was obtained.
As described above, by designing the light source (light radiating unit 47) so that the average luminance and size of the light source (light emitting portion 47) are within a predetermined range, the lamp device 10 that can achieve a glittering feeling equivalent to or better than that of an incandescent clear bulb is realized. Can do.
Note that “a light source having an average luminance of 5000 cd / m 2 (preferably 45000 cd / m 2 ) or more and an apparent size of 0.000001 sr or less” or “an average luminance of 5000 cd / m 2 (preferably 45000 cd / m). m 2 ) and a size of 64 mm 2 (preferably 17 mm 2 ) or less ”, the light source can be a planar light source or a solid light source (spherical, cube, rectangular parallelepiped, column, pyramid) Body etc.). Any light source may be used as long as light can be emitted in the direction of the tip of the globe 15 and the direction of the housing 11.
Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.
10 Lamp device
12 light emitting module
13 Light guide
18 Feeding unit
31 Light emitting element
33 Phosphor layer
34 Light emitter
42 Light guide column
43 Fixed part
55 Insertion hole
- A housing;
A light emitting module having a light emitting portion disposed on one end side of the housing;
A transparent glove that covers the light emitting portion and is disposed on one end side of the housing;
Has a light guide posts, one end side of the light guide pillar is placed in the center of the maximum outer diameter of the globe, and the other end face of the light guide pillar is arranged opposite to the light emitting portion, the one end side of the light guide pillar A light guide having a function of changing the direction of light on the end face;
A power feeding unit disposed on the other end of the housing;
The size of the light emitting portion is smaller than the size of the end face on the other end side of the light guide column,
The light emitting module includes a substrate, a plurality of light emitting elements mounted on the substrate, a frame portion surrounding the light emitting elements, and a surface filled with the light emitting element so as to cover the light emitting elements. And a surface of the phosphor layer is recessed from the frame portion .
- The function of changing the direction of the light of the light guide is a recess formed on the end surface on one end side of the light guide column,
The lamp device according to claim 1, wherein an opening diameter of the concave portion is in a range of 80 to 95% of a diameter of the light guide column.
- The depth of the said recessed part exists in the range of 30 to 70% with respect to the opening diameter of the said recessed part. The lamp device of Claim 2 characterized by the above-mentioned.
- The said light guide is protruded from two places of the surrounding surface of the other end side of the said light guide pillar, and has the fixing | fixed part fixed to the said housing | casing. Lamp device.
- The insertion hole which the said light guide column penetrates is formed, The cover which covers the one end side of the said housing | casing, the said light emission part, and the other end side of the said light guide column is comprised. The lamp device according to one .
Priority Applications (1)
|Application Number||Priority Date||Filing Date||Title|
|JP2014233058A JP6410033B2 (en)||2014-11-17||2014-11-17||Lamp device|
Applications Claiming Priority (2)
|Application Number||Priority Date||Filing Date||Title|
|JP2014233058A JP6410033B2 (en)||2014-11-17||2014-11-17||Lamp device|
|CN201520696616.7U CN204922595U (en)||2014-11-17||2015-09-09||Lamp device|
|Publication Number||Publication Date|
|JP2016096120A JP2016096120A (en)||2016-05-26|
|JP6410033B2 true JP6410033B2 (en)||2018-10-24|
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|JP2014233058A Active JP6410033B2 (en)||2014-11-17||2014-11-17||Lamp device|
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|JP (1)||JP6410033B2 (en)|
|CN (1)||CN204922595U (en)|
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|Publication number||Priority date||Publication date||Assignee||Title|
|US6350041B1 (en) *||1999-12-03||2002-02-26||Cree Lighting Company||High output radial dispersing lamp using a solid state light source|
|WO2010079436A1 (en) *||2009-01-09||2010-07-15||Koninklijke Philips Electronics N.V.||Light source with leds, light guide and reflector|
|JP5668251B2 (en) *||2010-08-31||2015-02-12||東芝ライテック株式会社||Light bulb shaped lamp and lighting equipment|
|JP2013200963A (en) *||2012-03-23||2013-10-03||Harison Toshiba Lighting Corp||Semiconductor light source, and lighting device|
Also Published As
|Publication number||Publication date|
|US8858039B2 (en)||Illuminating apparatus|
|JP3171487U (en)||LED lighting device|
|EP2199658A1 (en)||Light emitting element lamp and lighting equipment|
|JP2006244725A (en)||Led lighting system|
|EP2221529B1 (en)||Lamp system and lighting apparatus|
|JP2010205553A (en)||Lighting device|
|US20090323351A1 (en)||Lamp Structure|
|US9316386B2 (en)||Semiconductor lamp having two groups of LEDs corresponding to upper and lower sides of a reflector|
|JP2008243498A (en)||Led lighting device|
|US8138672B2 (en)||Lamps with replaceable covers|
|US20100238672A1 (en)||Light-emitting diode light bulb and application thereof|
|JP5668251B2 (en)||Light bulb shaped lamp and lighting equipment|
|US20130308319A1 (en)||Led lamp|
|JP5320609B2 (en)||Lamp apparatus and lighting apparatus|
|US20110141724A1 (en)||Led lighting device and system|
|CN203115538U (en)||Lens, illumination device, bulb-shaped lamp and illumination apparatus|
|JP2010192336A (en)||Lamp device and luminaire|
|CN102472461B (en)||Led lamp lighting device and|
|JP5354191B2 (en)||Light bulb shaped lamp and lighting equipment|
|US9057503B2 (en)||Light-emitting diode light bulb generating direct and decorative illumination|
|US8757836B2 (en)||Omnidirectional LED based solid state lamp|
|DE202012004733U1 (en)||Lamp housing and light-emitting diode bulb with this lamp housing|
|JP2011134665A (en)||Lamp with base and lighting fixture|
|JP2013542568A (en)||Uniform module light source|
|JP3152234U (en)||LED bulb and its lamp cover|
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