TW201903321A - Lampshade and manufacturing method thereof and lamp - Google Patents

Abstract

A lampshade, adapted to be disposed on an optical path of a light emitting unit of a lamp, including a cover and a blue-light filtering dye is provided. The blue-light filtering dye is doped in the cover. A weight ratio of the blue-light filtering dye and the cover is greater than 0.08 g/kg and is smaller than or equal to 6.4g/kg. Furthermore, a manufacturing method of abovementioned lampshade and a lamp including abovementioned lampshade are also provided.

Description

Lampshade and manufacturing method thereof and lamp

The present invention relates to a lampshade and a method of fabricating the same, and a lamp for applying the same.

Since the white light LED has the advantages of high luminous efficiency and long service life, it has been widely used in lamps for daily life. Generally, the white light emitting diode is mainly formed by using a blue light emitting diode as a substrate and coating a yellow light phosphor thereon, and the white light is generated by a partial blue light excitation by a blue light emitting diode. The yellow light fluorescing powder excites yellow light, and the other part of the blue light combines with yellow light to form white light.

However, the use of the above-described white light emitting diode luminaire exposes people to a large amount of blue light. The wavelength of blue light is short, and its photon energy is close to the photon energy of ultraviolet light. If the human eye is exposed to blue light for a long time, it is more likely to cause macular degeneration in the eye.

Therefore, in order to reduce the influence of blue light, one method is to use an amber LED (Amber LED) in the luminaire, but the amber illuminating diode is relatively expensive and is not suitable for mass production. In addition, if the color temperature of the beam emitted by the luminaire is to be changed, the illuminating diode in the luminaire is replaced. In this way, it is necessary to desolder the light-emitting diode originally in the lamp to replace the LED of another color, and the related replacement process is quite complicated.

The present invention provides a lamp cover that is capable of filtering out blue light in a light beam.

The present invention provides a luminaire having the above-described lampshade and having a low proportion of blue light in the emitted light beam.

The present invention provides a method of manufacturing a lampshade for fabricating the above-described lampshade.

An embodiment of the invention provides a lampshade adapted to be disposed on an optical path of a lighting unit of a luminaire. The lampshade includes a cover and a blue light dye. The filtered blue light dye is doped into the cover. The weight ratio between the blue light-absorbing dye and the cover is greater than or equal to 0.08 g/kg and less than or equal to 6.4 g/kg.

An embodiment of the invention provides a light fixture comprising a light unit and the light cover described above. The lamp cover is disposed on the optical path of the light emitting unit.

In an embodiment of the invention, the lamp cover further comprises a transflective layer. The transflective layer is disposed on the surface of the cover.

In an embodiment of the invention, the lamp cover further comprises a transflective layer. The cover further includes a first surface and a second surface opposite to each other. The first surface faces the outside. The second surface faces the light emitting unit. The transflective layer is disposed on the first surface.

In an embodiment of the invention, the material of the cover body comprises polycarbonate.

In an embodiment of the invention, the molecular formula of the above-mentioned blue light-absorbing dye is as shown in the following formula (1): ---(1).

In an embodiment of the invention, a method of manufacturing a lampshade is provided, comprising the following steps. Plastic is available. Doped blue light dye in plastic. A cover body doped with a blue light-absorbing dye is formed by an injection molding technique, wherein a weight ratio between the blue-light dye and the cover is greater than or equal to 0.08 g/kg and less than or equal to 6.4 g/kg.

In an embodiment of the invention, the plastic comprises polycarbonate.

In an embodiment of the invention, the molecular formula of the above-mentioned blue light-absorbing dye is as shown in the following formula (1): ---(1).

In an embodiment of the invention, the method of fabricating the lampshade further comprises: forming a transflective layer on a surface of the shell doped with the blue-light dye.

Based on the above, in the lampshade of the embodiment of the present invention, the doped blue light dye is doped in the cover, and the weight ratio between the blue light dye and the cover is greater than or equal to 0.08 g/kg and less than or equal to 6.4 g/kg. Therefore, the blue light in the light beam passing through the above-mentioned lampshade can be largely filtered out and has good optical efficiency. Since the lamp according to the embodiment of the present invention has the above-mentioned lamp cover, it is possible to filter the blue light in the light beam by arranging the lamp cover in a simple combination manner on the optical path of the light-emitting element in the lamp without using the related technology. The amber LED is either a step of desoldering and therefore has lower production costs and a simpler manufacturing process. A method of manufacturing a lampshade according to an embodiment of the present invention is for manufacturing the above-described lampshade.

The above described features and advantages of the invention will be apparent from the following description.

1 is a schematic view of a light fixture in accordance with an embodiment of the present invention. 2 is a schematic view showing the assembly of the lamp of FIG. 1. Figure 3 is a cross-sectional view taken along line I-I of Figure 1. 4A is a luminescence spectrum diagram of a light beam passing through a cover of an undoped blue light dye. 4B is a luminescence spectrum diagram of a light beam that passes through the blue-dye-dye-coated cover of FIGS. 1 and 2. Figure 5 is a perspective view of the penetration spectrum of the blue-dye-filled shell of Figures 1 and 2. For the sake of clarity, the transflective layer is omitted in FIGS. 1 and 2.

Referring to FIG. 1 and FIG. 2 , in the embodiment, the luminaire 200 includes a body 210 , a light emitting unit 220 , and a lamp cover 100 . The above elements will be explained in detail in the following paragraphs.

The body 210 is coupled to a post (not shown) of the luminaire 200. A controller (not shown) is disposed in the body 210 to control whether the light emitting unit 220 emits light or not. The body 210 has an accommodation space R.

The light emitting unit 220 includes a plurality of light emitting elements 222 and a plurality of lenses 224. The light emitting elements 222 and the lenses 224 are disposed in a matrix in the accommodating space R. The light emitting unit 220 is electrically connected to the recess 220. These light-emitting elements 222 are controlled by the controller to emit a light beam L, and an embodiment thereof is, for example, a white light-emitting diode. The lens 224 is disposed on the optical path of the light-emitting element 222 to modify the light pattern of the light beam L.

The lamp cover 100 includes a cover 110 and a blue light-absorbing dye 120. The cover 110 is disposed on the optical path of the light-emitting unit 220, and is engaged with a card slot (not shown) at the periphery of the light-emitting unit 220, for example, to cover the light-emitting unit 220. The present invention It is not limited by the arrangement of the cover 110. The filtered blue light dye 120 is doped into the shell 110. The material of the cover 110 includes polycarbonate (PC), which is resistant to changes in the climate to prevent the light-emitting unit 220 from being affected by the weather. The molecular formula of the blue light-absorbing dye 120 is as shown in the following formula (1): ---(1). The blue light-sensitive dye 120 has a chemical formula of C ₁₈ H ₁₁ NO ₂ and a molecular weight of 273.29. The weight ratio between the blue light-absorbing dye 120 and the cover 110 (the weight of the blue light-absorbing dye 120 / the weight of the cover 110) is 0.08 g/kg or more and 6.4 g/kg or less. In the present embodiment, the weight ratio between the cover 110 and the blue light-absorbing dye 120 is, for example, 1.2 g/kg.

Referring to FIG. 3, in addition, the globe 100 can selectively provide a transflective layer 130. The cover 110 has a first surface S1 and a second surface S2 opposite to each other. The first surface S1 faces the outside. The second surface S2 faces the light emitting unit 220. The transflective layer 130 is disposed on the first surface S1. The transflective layer 130 is used to allow the light beam L from the cover 110 to penetrate and to reflect the ambient light beam EL from the outside. Since the ambient light beam EL is not transmitted to the cover 100 doped with the blue light-absorbing dye 120, that is, is reflected by the semi-transmissive semi-reflective layer 130, the yellow vision caused by the staining of the blue light-sensitive dye 120 by the cover 100 itself can be improved.

In the above, when the light emitting unit 220 in the luminaire 200 emits the light beam L, the light beam L penetrates the cover 110 doped with the blue light-absorbing dye 120 to filter out the blue light in the light beam L to form the light beam L'. The beam L' then penetrates the transflective layer 130 to provide the user with illumination. Table 1 is a table of optically related parameters of the light beam passing through the cover of the undoped blue light dye and the light beam passing through the cover of Figs. 1 and 2. Table 2 shows the transmittance and light-emitting efficiency of the light beam L passing through the globe 100 of Figs. 1 and 2 at different frequency bands. Please refer to Table 1 and Table 2 below. Table I Referring to FIG. 4A, FIG. 4B, FIG. 5, Table 1 and Table 2, the ratio of the blue light (400 nm to 460 nm) in the beam to the total energy of the beam is calculated by the following equation. Calculation: --- (1) E _w (λ) of the above equation (1) means that the wavelength of the light beam passing through a specific weight ratio w between the blue light-absorbing dye 110 and the cover 120 is a function of energy, λ represents Is the wavelength. The functional relationship of the E _w (λ) of the light beam passing through the cover 120 of the blue-filtering dye 110 having a specific weight ratio w is shown in Figs. 4A and 4B. The numerator in equation (1) represents the energy that the beam corresponds to in the wavelength range of 400 nm to 460 nm. The denominator in equation (1) represents the total energy of the beam. Compared to the cover without the doped blue light dye (ie, FIG. 4A), the cover 110 doped with the blue light-absorbing dye 120 can greatly filter out the light beam of the light beam L in the blue light band (for example, the absorption wavelength range is 400). The beam of light between nanometers and 460 nm) and the beam of light between 500 nm and 700 nm is substantially greater than 80% (Fig. 5). The lampshade 100 of the present embodiment can conform to the specifications of the relevant photobiosafety regulations of IEC 62421 or IEC 62778 formulated by the International Electrotechnical Commission, and the blue light hazard assessment result is the lowest hazard RG0 rating. Moreover, according to Table 1 and Table 2, the luminous flux and the light-emitting efficiency of the light beam L' are maintained at a certain level without significant attenuation. The color temperature of the light beam L' can be maintained above 2700K, and the color rendering of the light beam L' can be maintained above 70, still meeting the general lighting needs.

Figure 6A is a luminescence spectrum of a light beam passing through a lampshade having a shell of undoped blue light dye. Fig. 6B is an illuminating spectrum diagram of a light beam of a lampshade which is doped with a weight ratio of the filter blue light dye to the cover of 0.016 g/kg. Fig. 6C is a luminescence spectrum diagram of a light beam by a lampshade doped with a weight ratio between the blue-filter dye and the cover of 0.08 g/kg. Fig. 6D is an illuminating spectrum diagram of a light beam of a lampshade which is doped with a weight ratio between the filter blue light dye and the cover of 0.8 g/kg. Figure 6E is a luminescence spectrum of a light beam through a lampshade doped with a weight ratio of 3.2 g/kg between the filtered blue light dye and the cover. Figure 6F is an illuminating spectrum diagram of a light beam passing through a lampshade having a weight ratio of 6.4 g/kg between the blue-filter dye and the cover. Figure 7 is a perspective view of the penetration of a shell doped with different weight ratios of blue light dye. Table 3 is a table of optically related parameters of the light beam passing through the cover of the undoped blue-light dyeing envelope and the beam of the blue-coated dye-coated body respectively doped with different weight ratios. Referring to FIG. 6A and Table 3, the light beam is, for example, a light beam emitted by a light-emitting element of the shape Luxeon 5050 provided by LUMILEDS, and the light-emitting spectrum of FIG. 6A is the light beam passing through the undoped blue light dye. The cover, and the ratio of the blue light (400 nm to 460 nm) in the beam in Table 3 to the total energy of the beam can be calculated by the above equation (1), and will not be described again. The relationship of the E _w (λ) of the light beam passing through the cover 120 of the blue light-absorbing dye 110 having different weight ratios is shown in the above-mentioned FIGS. 6A to 6F. On the other hand, the Light Flux Ratio is defined as the ratio of the total energy of the light beam passing through the cover of the blue light-absorbing dye having a specific weight ratio to the total energy of the light beam passing through the cover of the undoped blue light dye. , which is calculated by the following equation (2): (2) The numerator in the above equation (2) represents the total energy of the light beam of the lampshade, which is doped with a specific weight ratio w between the blue-light dye and the cover, the denominator in equation (2) The representative means that the denominator of the luminous flux ratio is calculated based on the total energy of the light beam of the cover body which is not doped with the blue light dye. Referring to FIGS. 6A-6F, 7 and 3, the ratio of blue light (19.1%) in the light beam passing through the cover of the undoped blue light dye is satisfied by satisfying the relationship between the blue light dye 120 and the cover 110. The proportion of blue light (maximum 0.3%) in the light beam of the lampshade having a weight ratio of 0.08 g/kg or more and 6.4 g/kg or less is greatly reduced. If the beam passes through a lampshade with a weight ratio between the blue-light dye 110 and the cover 120 of less than 0.08 g/kg (exemplified by 0.016 g/kg), the beam also has a comparable proportion of blue light (8.8%). If the light beam passes through the lampshade having a weight ratio between the blue light-sensitive dye 110 and the cover 120 of more than 6.4 g/kg, the luminous flux of the light beam is significantly lowered. That is to say, a lamp cover conforming to the above-mentioned weight ratio range (greater than 0.08 g/kg and less than or equal to 6.4 g/kg) can effectively eliminate blue light in the light beam, and the light beam passing through the lamp cover can have good optical efficiency. In addition, referring to FIG. 6A to FIG. 6F, FIG. 7 and Table 3 above, it can be clearly seen that the blue light dye is mainly used to filter out the light beam in the blue wavelength range, and has little influence on other color lights.

Fig. 8 is a flow chart showing the manufacture of a lampshade according to an embodiment of the present invention.

Referring to FIG. 8, step S100: providing plastic. The plastic can include polycarbonate. Step S200: Doping the blue light dye in the plastic. In this embodiment, it is possible to mix by uniaxial rolling agitation to uniformly mix the blue-light dye in the plastic. In other embodiments, it is also possible to pass a Double Helix Belt Mixer or a Three-axis Mixer to achieve a better mixing effect. Step S300: forming a cover body doped with a blue light-absorbing dye through injection molding technology (Injection Molding Technology), wherein a weight ratio between the blue light-absorbing dye and the cover body is greater than or equal to 0.08 g/kg and less than or equal to 6.4 g/kg. Step S400: forming a semi-transparent semi-reflective layer on the surface of the cover body doped with the blue-light dyeing dye. So far, the lampshade 100 in the embodiment of the present invention has been substantially completed.

In summary, in the lampshade of the embodiment of the present invention, it is doped with a blue light-absorbing dye in the cover, and the weight ratio between the blue-light dye and the cover is greater than or equal to 0.08 g/kg and less than or equal to 6.4 g/ Kilograms, so the blue light in the light beam passing through the above lampshade can be filtered out and has good optical efficiency. Since the lamp according to the embodiment of the present invention has the above-mentioned lamp cover, it is possible to filter the blue light in the light beam by arranging the lamp cover in a simple combination manner on the optical path of the light-emitting element in the lamp without using the related technology. The amber LED is either a step of desoldering and therefore has lower production costs and a simpler manufacturing process. A method of manufacturing a lampshade according to an embodiment of the present invention is for manufacturing the above-described lampshade.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧shade

110‧‧‧ Cover

120‧‧‧Blue light dye

130‧‧‧Semi-transparent semi-reflective layer

200‧‧‧ lamps

210‧‧‧ body

220‧‧‧Lighting unit

222‧‧‧Lighting elements

224‧‧‧ lens

EL‧‧‧Environmental Beam

I-I’‧‧‧ cut line

L, L’‧‧‧ beams

R‧‧‧ accommodating space

S1‧‧‧ first surface

S2‧‧‧ second surface

S100~S400‧‧‧Steps

1 is a schematic view of a light fixture in accordance with an embodiment of the present invention. 2 is a schematic view showing the assembly of the lamp of FIG. 1. Figure 3 is a cross-sectional view taken along line I-I of Figure 1. 4A is a luminescence spectrum diagram of a light beam passing through a cover of an undoped blue light dye. 4B is a luminescence spectrum diagram of a light beam that passes through the blue-dye-dye-coated cover of FIGS. 1 and 2. Figure 5 is a perspective view of the penetration spectrum of the blue-dye-filled shell of Figures 1 and 2. Figure 6A is a luminescence spectrum of a light beam passing through a lampshade having a shell of undoped blue light dye. Fig. 6B is an illuminating spectrum diagram of a light beam passing through a lampshade having a weight ratio of the filter blue light dye to the cover of 0.016 g/kg. Fig. 6C is a luminescence spectrum diagram of a light beam passing through a lampshade having a weight ratio between the blue light-absorbing dye and the cover of 0.08 g/kg. Figure 6D is a luminescence spectrum diagram of a light beam passing through a lampshade having a weight ratio of 0.8 g/kg between the blue-filter dye and the cover. Figure 6E is a luminescence spectrum diagram of a light beam passing through a lampshade having a weight ratio of 3.2 g/kg between the blue-filter dye and the cover. Figure 6F is an illuminating spectrum diagram of a light beam passing through a lampshade having a weight ratio of 6.4 g/kg between the blue-filter dye and the cover. Figure 7 is a perspective view of the penetration of a lampshade having a cover of a blue light-dye dye having different weight ratios. Fig. 8 is a flow chart showing the manufacture of a lampshade according to an embodiment of the present invention.

Claims (12)

A light cover adapted to be disposed on an optical path of a light emitting unit of a light fixture, the light cover comprising: a cover; and a blue light dye doped in the cover, wherein the blue light dye and the cover are The weight ratio between the two is greater than or equal to 0.08 g/kg and less than or equal to 6.4 g/kg. The lampshade of claim 1, further comprising a semi-transparent semi-reflective layer disposed on a surface of the cover. The lampshade of claim 1, wherein the material of the cover comprises polycarbonate. The lampshade of claim 1, wherein the molecular formula of the blue-light dye is as shown in the following formula (1): ---(1). A method of manufacturing a lampshade, comprising: providing a plastic; doping a blue light dye in the plastic; forming a cover doped with the blue light dye by an injection molding technique, wherein the blue light dye and the cover are The weight ratio between them is greater than or equal to 0.08 g/kg and less than or equal to 6.4 g/kg. The method of manufacturing a lampshade of claim 5, wherein the plastic comprises polycarbonate. The method for manufacturing a lampshade according to claim 5, wherein the molecular formula of the blue-light dye is as shown in the following formula (1): ---(1). The method of manufacturing a lampshade of claim 5, further comprising: forming a semi-transparent semi-reflective layer on a surface of the cover body doped with the blue-light dye. A light fixture comprising: a light emitting unit; and a light cover disposed on the optical path of the light emitting unit, the light cover comprising: a cover; and a blue light dye doped in the cover, wherein the blue light dye is The weight ratio with the cover is in the range of 0.08 g/kg or more and 6.4 g/kg or less. The lamp cover of the ninth aspect of the invention, wherein the lamp cover further comprises a semi-transparent semi-reflective layer, and the cover further comprises a first surface and a second surface opposite to each other, the first surface facing the outside, The second surface faces the light emitting unit, wherein the transflective layer is disposed on the first surface. The luminaire of claim 9, wherein the material of the cover comprises polycarbonate. The luminaire of claim 9, wherein the molecular formula of the blue-light dye is as shown in the following formula (1): ---(1).