TWI662230B - Lampshade and manufacturing method thereof and lamp - Google Patents

Abstract

A lampshade is suitable for being arranged on a light path of a light-emitting unit of a lamp. The lamp cover includes a cover body and a blue light filter dye. The blue filter dye is doped in the casing. The weight ratio between the cover body and the blue filter dye is 0.08 g / kg or more and 6.4 g / kg or less. In addition, a method for manufacturing the above-mentioned lampshade and a lamp including the same are also proposed.

Description

Lampshade, manufacturing method thereof and lamp

The invention relates to a lampshade, a manufacturing method thereof and a lamp using the lampshade.

Because White Light LED has the advantages of high luminous efficiency and long service life, it has been widely used in daily life lamps. Generally speaking, the production method of white light-emitting diodes is mainly based on blue light-emitting diodes and coated with yellow light-emitting phosphors. The principle of generating white light is to excite part of the blue light emitted by blue-light-emitting diodes. Yellow light fluorescent powder is used to excite yellow light, and the other part of blue light is combined with yellow light to form white light.

However, the lamps using the above-mentioned white light-emitting diodes expose people to a large amount of blue light. Blue light has a short wavelength and its photon energy is close to that of ultraviolet light. If the human eye is exposed to blue light for a long time, it is more likely to cause macular lesions in the eye.

Therefore, in order to reduce the impact of blue light, one approach is to use Amber LEDs in the lamp, but the cost of amber light emitting diodes is Higher, not suitable for mass production. In addition, if the color temperature of the light beam emitted by the lamp is to be changed, the light emitting diode in the lamp must be replaced. In this way, the original light-emitting diode in the lamp needs to be desoldered to replace the light-emitting diode of another color, and the related replacement process is quite complicated.

The invention provides a lampshade capable of filtering out blue light in a light beam.

The invention provides a lamp having the above-mentioned lampshade, and the proportion of blue light in the light beam emitted by the lamp is low.

The invention provides a method for manufacturing a lampshade, which is used for manufacturing the lampshade.

An embodiment of the present invention provides a lamp cover, which is suitable for being disposed on a light path of a light emitting unit of a lamp. The lamp cover includes a cover body and a blue light filter dye. The blue filter dye is doped in the casing. The weight ratio between the blue filter dye and the cover is 0.08 g / kg or more and 6.4 g / kg or less.

An embodiment of the present invention provides a lamp including a light emitting unit and the above-mentioned lamp cover. The lamp cover is arranged on the light path of the light emitting unit.

In an embodiment of the present invention, the lampshade further includes a semi-transparent and semi-reflective layer. The semi-transmissive and semi-reflective layer is disposed on the surface of the cover.

In an embodiment of the present invention, the lampshade further includes a semi-transparent and semi-reflective 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 arranged on the first table surface.

In an embodiment of the present invention, a material of the cover includes polycarbonate.

In an embodiment of the present invention, the molecular formula of the blue filter dye is shown by the following formula (1):

According to an embodiment of the present invention, a method for manufacturing a lampshade includes the following steps. Available in plastic. Doped blue filter dye in plastic. A cover body doped with a blue filter dye is formed through an injection molding technique, wherein a weight ratio between the blue filter 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.

In an embodiment of the present invention, the plastic includes polycarbonate.

In an embodiment of the present invention, the molecular formula of the blue filter dye is shown by the following formula (1):

In an embodiment of the present invention, the steps of the method for manufacturing a lampshade further include: forming a semi-transparent and semi-reflective layer on a surface of the mask body doped with a blue filter dye.

Based on the above, in the lamp cover according to the embodiment of the present invention, the blue light filter dye is doped in the cover body, and the weight ratio between the blue light filter dye and the cover body is 0.08 g / kg or more and 6.4 g / kg or less. Therefore, the blue light in the light beam passing through the lampshade can be largely filtered and has good optical efficiency. Since the lamp according to the embodiment of the present invention has the above-mentioned lamp cover, the above-mentioned lamp cover can be arranged on the light path of the light-emitting element in the lamp in a simple combination manner to filter out blue light in the light beam without using related technologies. The amber light-emitting diode in the step is a step of desoldering, so it has a lower production cost and a simpler manufacturing process. The manufacturing method of the lampshade in the embodiment of the present invention is used to manufacture the lampshade.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

100‧‧‧ Lampshade

110‧‧‧ cover

120‧‧‧ blue filter dye

130‧‧‧ transflective layer

200‧‧‧Lighting

210‧‧‧ Ontology

220‧‧‧light-emitting unit

222‧‧‧Light-emitting element

224‧‧‧Lens

EL‧‧‧Ambient beam

I-I’‧‧‧ hatched

L, L’ ‧‧‧ Beam

R‧‧‧ accommodation space

S1‧‧‧First surface

S2‧‧‧Second surface

S100 ~ S400‧‧‧step

FIG. 1 is a schematic diagram of a lamp according to an embodiment of the present invention.

FIG. 2 is an assembly diagram of the lamp in FIG. 1.

Fig. 3 is a schematic cross-sectional view taken along the line I-I in Fig. 1.

FIG. 4A is a light emission spectrum diagram of a light beam passing through a cover body not doped with a blue filter dye.

4B is a light emission spectrum diagram of a light beam passing through the cover doped with the blue filter dye in FIGS. 1 and 2.

FIG. 5 is a transmission spectrum diagram of the cover body doped with the blue filter dye in FIGS. 1 and 2.

FIG. 6A is a light emission spectrum diagram of a light beam passing through a lamp cover having an un-doped blue filter dye.

6B is a light emission spectrum diagram of a light beam passing through a lamp cover having a weight ratio of 0.016 g / kg between the blue filter dye and the cover body.

6C is a light emission spectrum diagram of a light beam passing through a lamp cover having a weight ratio of 0.08 g / kg between the blue filter dye and the cover.

FIG. 6D is a light emission spectrum diagram of a light beam passing through a lamp cover having a weight ratio of 0.8 g / kg between the blue filter dye and the cover.

FIG. 6E is a light emission spectrum diagram of a light beam passing through a lamp cover having a weight ratio of 3.2 g / kg between the blue filter dye and the cover.

6F is a light emission spectrum diagram of a light beam passing through a lamp cover having a weight ratio of 6.4 g / kg between a blue filter dye and a cover body.

Figure 7 is the penetration of a lampshade with different weight ratios of the blue light filter dye Spectrogram. FIG. 8 is a schematic flowchart of manufacturing a lampshade according to an embodiment of the present invention.

FIG. 1 is a schematic diagram of a lamp according to an embodiment of the present invention. FIG. 2 is an assembly diagram of the lamp in FIG. 1. Fig. 3 is a schematic cross-sectional view taken along the line I-I in Fig. 1. FIG. 4A is a light emission spectrum diagram of a light beam passing through a cover body not doped with a blue filter dye. 4B is a light emission spectrum diagram of a light beam passing through the cover doped with the blue filter dye in FIGS. 1 and 2. FIG. 5 is a transmission spectrum diagram of the cover body doped with the blue filter dye in FIGS. 1 and 2. For clarity, the semi-transmissive and semi-reflective layer is omitted in FIGS. 1 and 2.

Please refer to FIGS. 1 and 2. In this embodiment, the lamp 200 includes a main 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 connected to a post (not shown) of the lamp 200. A controller (not shown) is provided in the main body 210 to control whether the light emitting unit 220 emits light or not. The main 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, and the light-emitting elements 222 and the lenses 224 are disposed in the accommodation space R in a matrix manner. The light emitting unit 220 is electrically connected to the body 210. These light-emitting elements 222 are controlled by a controller to emit a light beam L, and their implementations are, for example, white light-emitting diodes. The lens 224 is correspondingly disposed on the optical path of the light emitting element 222 to modify the light type of the light beam L.

The lamp cover 100 includes a cover body 110 and a blue light filtering dye 120. The cover 110 is suitable for being disposed on the light path of the light-emitting unit 220 and is, for example, engaged with a slot (not shown) around the light-emitting unit 220 in an engaging manner so that the cover 110 covers the light-emitting unit 220. The present invention The arrangement of the cover body 110 is not limited. The blue filter dye 120 is doped in the cover body 110. The material of the cover body 110 includes Polycarbonate (PC), which can resist the climate change to avoid the light-emitting unit 220 from being affected by the climate. The molecular formula of the blue filter dye 120 is shown in the following formula (1): The chemical formula of the blue filter dye 120 is C ₁₈ H ₁₁ NO ₂ and its molecular weight is 273.29. The weight ratio between the blue filter dye 120 and the cover 110 (the weight of the blue filter dye 120 / the weight of the cover 110) is 0.08 g / kg or more and 6.4 g / kg or less. In this embodiment, the weight ratio between the cover body 110 and the blue filter dye 120 is, for example, 1.2 g / kg.

Referring to FIG. 3, in addition, the lamp cover 100 may be selectively provided with a semi-transparent and semi-reflective layer 130. The cover body 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 semi-transmissive and semi-reflective layer 130 is used to allow the light beam L from the cover body 110 to penetrate and reflect the ambient light beam EL from the outside. Since the ambient light beam EL is not transmitted to the cover body 110 doped with the blue filter dye 120, that is, It is reflected by the semi-transparent and semi-reflective layer 130, so the yellow vision caused by the cover 110 itself being dyed by the blue filter dye 120 can be improved.

According to the above, when the light emitting unit 220 in the lamp 200 emits the light beam L, the light beam L penetrates the cover 110 doped with the blue filter dye 120 to filter out the blue light in the light beam L to form the light beam L '. The light beam L 'passes through the transflective layer 130 to provide the user with illumination. Table 1 is a table of optical related parameters of the light beam passing through the cover body not doped with the blue filter dye and the light beam passing through the cover body in FIG. 1 and FIG. 2. Table 2 shows the transmittance and light output efficiency of the light beam L passing through the lamp cover 100 in FIG. 1 and FIG. 2 in different frequency bands. Please refer to Table 1 and Table 2 below.

Please refer to FIG. 4A, FIG. 4B, FIG. 5, Table 1 and Table 2. The calculation method of the ratio of the blue light (400 nm to 460 nm) energy in the light beam to the total energy of the light beam is calculated by the following equation: E _w (λ) of the above equation (1) refers to a function relationship between a wavelength and an energy of a light beam having a specific weight ratio w between the blue filter dye 120 and the cover 110, and λ represents a wavelength. The functional relationship of E _w (λ) of the light beam passing through the cover 110 of the blue filter dye 120 having a specific weight ratio w is shown in FIGS. 4A and 4B. The molecules in equation (1) represent: the energy corresponding to the light beam in the wavelength range of 400 nm to 460 nm. The denominator in equation (1) means: the total energy of the beam. Compared with the cover body not doped with the blue light filter dye (ie, FIG. 4A), the cover body 110 doped with the blue light filter dye 120 can largely filter the light beam of the light beam L in the blue light band (for example, the absorption wavelength range is 400). Beams between nanometers and 460 nanometers), while the penetration of beams with wavelengths between 500 and 700 nanometers is approximately greater than 80% (ie, Figure 5). The lampshade 100 of this embodiment can comply with the specifications of the relevant photobiological safety regulations of IEC 62421 or IEC 62778 formulated by the International Electrotechnical Commission, and its blue light hazard evaluation result is the lowest RG0 level. In addition, according to Tables 1 and 2, it can be known that the luminous flux and the light emitting efficiency of the light beam L 'still maintain 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, which still meets the general lighting requirements.

FIG. 6A is a light emission spectrum diagram of a light beam passing through a lamp cover having an un-doped blue filter dye. FIG. 6B is a light emission spectrum diagram of a light beam passing through a lampshade with a weight ratio of 0.016 g / kg between the blue filter dye and the cover body. Figure 6C is passed Luminescence spectrum of a light beam doped with a lampshade with a weight ratio of 0.08 g / kg between the blue filter dye and the cover. FIG. 6D is a light emission spectrum diagram of a light beam passing through a lampshade with a weight ratio of 0.8 g / kg between a blue filter dye and a cover body. FIG. 6E is a light emission spectrum diagram of a light beam passing through a lampshade with a weight ratio of 3.2 g / kg between the blue filter dye and the cover body. 6F is a light emission spectrum diagram of a light beam passing through a lamp cover having a weight ratio of 6.4 g / kg between a blue filter dye and a cover body. FIG. 7 is a transmission spectrum diagram of a cover body doped with blue light filter dyes with different weight ratios. Table 3 is a table of the optical related parameters of the light beams passing through the un-doped blue filter dye enclosure and the light beams passing through the dopant with different weight proportions of the blue filter dye.

Please refer to FIG. 6A and Table 3 first. The light beam is, for example, a light beam emitted by a light-emitting element of the shape number Luxeon 5050 provided by LUMILEDS. The ratio of the blue light (400 nm to 460 nm) energy in the light beam in Table 3 to the total energy of the light beam can be calculated using the above equation (1), which is not repeated here. The function relationship of E _w (λ) of the light beam passing through the cover body 110 with the blue light filter dye 120 having different weight ratios is shown in the above FIG. 6A to FIG. 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 with a specific weight ratio of the blue filter dye to the total energy of the light beam passing through the cover without the blue filter dye. , Which is calculated by the following equation (2): The numerator in the above equation (2) means: the total energy of the light beam passing through the lampshade doped with a specific weight ratio w between the blue filter dye and the cover, and the denominator in equation (2) means that : The total energy of the light beam passing through the cover body not doped with the blue filter dye, and the denominator of the luminous flux ratio is calculated based on FIG. 6A. Please refer to FIG. 6A to FIG. 6F, FIG. 7 and Table 3. Compared with the blue light ratio (19.1%) in the light beam passing through the cover body not doped with the blue filter dye, by satisfying the blue light filter 120 and the cover body 110 The proportion of blue light (maximum 0.3%) in the light beam of the lampshade under the condition that the weight ratio is 0.08 g / kg or more and 6.4 g / kg or less is greatly reduced. If the light beam passes through the lampshade whose weight ratio between the blue filter dye 120 and the cover body 110 is less than 0.08 g / kg (taking 0.016 g / kg as an example), the beam still has a considerable blue light ratio (8.8%). If the light beam passes through the lampshade whose weight ratio between the blue filter dye 120 and the cover 110 is greater than 6.4 g / kg, the luminous flux of the light beam will be significantly reduced. That is to say, a lampshade that meets the above weight ratio range (0.08 g / kg or more and 6.4 g / kg or less) can effectively eliminate the blue light in the light beam, and the light beam passing through the light shade can have good optical efficiency. In addition, please refer to FIG. 6A to FIG. 6F, FIG. 7 and Table 3 again, it can be clearly seen that the blue filter dye mainly filters out the light beams in the blue wavelength range, and has little effect on other colored lights.

FIG. 8 is a schematic flowchart of manufacturing a lampshade according to an embodiment of the present invention.

Referring to FIG. 8, step S100: providing plastic. Plastic may include polycarbonate. Step S200: doping the blue light filter dye into the plastic. In this embodiment, the uniaxial rolling stirring can be used to mix the blue filter dyes in the plastic. In other embodiments, a double-helix mixer (Three-axis Mixer) or a three-axis mixer (Three-axis Mixer) can be used to make the mixing effect better. Step S300: forming a cover doped with a blue filter dye by injection molding technology, wherein the weight ratio between the blue filter dye and the cover 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 and semi-reflective layer on the surface of the cover body doped with the blue filter dye. So far, the lampshade 100 in the embodiment of the present invention has been substantially manufactured.

In summary, in the lampshade of the embodiment of the present invention, the blue light filter dye is doped in the cover body, and the weight ratio between the blue light filter dye and the cover body is 0.08 g / kg or more and 6.4 g / kg or less. Kg, so the blue light in the light beam passing through the 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, the above-mentioned lamp cover can be arranged on the light path of the light-emitting element in the lamp in a simple combination manner to filter out blue light in the light beam without using related technologies. Amber light-emitting diode in or is desoldered Steps, and therefore have lower production costs and simpler manufacturing processes. The manufacturing method of the lampshade in the embodiment of the present invention is used to manufacture the lampshade.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (12)

A lampshade is adapted to be arranged on the light path of a light-emitting unit of a lamp. The lampshade comprises: a lampshade; and a blue light filter dye doped in the lampshade, wherein the lampshade is formed by injection molding. And the weight ratio between the blue filter dye and the cover is greater than or equal to 0.08 g / kg and less than or equal to 6.4 g / kg. The lampshade described in item 1 of the scope of patent application, further includes a semi-transmissive and semi-reflective layer disposed on the surface of the shade. The lampshade according to item 1 of the scope of patent application, wherein the material of the cover body comprises polycarbonate. The lampshade according to item 1 of the scope of patent application, wherein the molecular formula of the blue filter dye is shown by the following formula (1): A method for manufacturing a lampshade includes: providing a plastic; doping a blue light filter dye into the plastic; and forming a cover body doped with the blue light filter dye by an injection molding technique, wherein the blue light filter dye and the cover body The weight ratio between 0.08 g / kg and 6.4 g / kg. The method for manufacturing a lampshade according to item 5 of the patent application scope, wherein the plastic comprises polycarbonate. The method for manufacturing a lampshade according to item 5 of the scope of patent application, wherein the molecular formula of the blue-filtering dye is shown by the following formula (1): The method for manufacturing a lampshade according to item 5 of the scope of patent application, further comprising: forming a semi-transparent semi-reflective layer on the surface of the mask body doped with the blue filter dye. A lamp includes: a light-emitting unit; and a lamp cover arranged on a light path of the light-emitting unit. The lamp cover includes: a cover body; and a blue light filter dye doped in the cover body, wherein the cover body transmits It is formed by injection molding, and the weight ratio between the blue filter dye and the cover is within a range of 0.08 g / kg or more and 6.4 g / kg or less. As described in item 9 of the scope of patent application, the lampshade further includes a semi-transmissive semi-reflective layer, and the cover further includes a first surface and a second surface opposite to each other, the first surface facing the outside, the The second surface faces the light emitting unit, and the semi-transmissive and semi-reflective layer is disposed on the first surface. The luminaire according to item 9 of the scope of patent application, wherein the material of the cover body includes polycarbonate. The lamp according to item 9 of the scope of the patent application, wherein the molecular formula of the blue filter dye is shown by the following formula (1):