TWI523276B - Methods for fabricating a high color rendering index,white light solid phosphor and a high color rendering index, white light-emitting element - Google Patents

Description

Method for producing high color rendering white light solid phosphor and high color rendering white light emitting element

The invention relates to a method for fabricating a high color rendering white light solid phosphor and a high color rendering white light emitting element, in particular to a high color rendering warm white light solid phosphor and a ceramic phosphor or glass phosphor. A method of coloring a warm white light emitting element.

The current white light-emitting elements are mostly composed of phosphors of various colors and different color light-emitting diodes. For example, a yellow fluorescent powder is coated on the surface of the blue light emitting diode to form a white light emitting diode, or a green fluorescent powder and a red fluorescent powder are coated on the surface of the blue light emitting diode to form a white fluorescent powder. White light emitting diode. In the conventional white light-emitting device process, the phosphor powder is applied by first mixing the phosphor powder with the glue, and then applying it to the surface of the light-emitting diode (for example, a blue light-emitting diode) by filling and extrusion. . However, the mixing and coating process of the phosphor powder and the glue is complicated and time consuming, and it is easy to cause a problem of uneven distribution of the phosphor powder.

In order to solve the above problems, a solid phosphor (for example, a ceramic phosphor or a glass phosphor) which can replace a sealant which is a mixture of glue and phosphor powder has recently been developed. The solid-state phosphor is not only simple and time-saving, but also has no problem of uneven distribution of phosphor powder, thereby improving the reliability and service life of the white light emitting diode. However, limited to the current technology, only yellow-green or yellow solid-state phosphors can be produced at present, resulting in the solid-state phosphor and the white light-emitting element made of the solid-state phosphor, either via blue light or violet light (or After excitation by ultraviolet light, the white light spectrum produced by the spectrum lacks a spectrum of wavelengths from 580 nanometers (nm) to 670 nanometers (nm). Therefore, the color rendering of the white light produced by the solid phosphor and the white light-emitting element made of the solid-state phosphor is low, and the color rendering property is generally only about 65-75, and the high color rendering property cannot be achieved (ie, CRI >80).

Furthermore, since the white light spectrum emitted by the solid phosphor and the white light-emitting element made of the solid-state phosphor is a spectrum that is biased toward a short wavelength, the solid phosphor and the white light produced by the solid phosphor are caused. The white light emitted by the light-emitting element is biased toward cool white light, and its color temperature is between about 10,000 °K and 5000 °K. However, prolonged exposure to high color temperature sources may also inhibit the secretion of melatonin at night, leading to increased insomnia and the risk of cancer. Therefore, the solid phosphor and the white light produced by the solid phosphor Light-emitting elements are clearly not suitable for everyday lighting.

In view of the above, there is a need for a method for producing a high color rendering white solid fluorescent body and a high color rendering white light emitting device, and producing a light solid fluorescent body and a high color rendering white light emitting element capable of emitting high color rendering white light. And it can effectively adjust and control the color temperature of the white light emitted by it, and then emit a warm white light with high color rendering.

An object of the present invention is to provide a method for producing a high color rendering white light solid phosphor, which uses a ceramic phosphor or a glass phosphor to replace a sealant obtained by mixing a phosphor and a glue, and is used in a porcelain phosphor. Or coating a surface of the glass phosphor with a red or orange phosphor to enhance the color rendering of the solid phosphor (ceramic phosphor or glass phosphor) and effectively control the color temperature thereof, thereby providing a A white color solid phosphor with high color rendering, which in turn provides a warm white light solid phosphor with high color rendering.

Another object of the present invention is to provide a method for producing a high color rendering white light emitting device, which is formed by a solid phosphor (ceramic phosphor or glass phosphor) coated with red or orange phosphor powder on its surface. The white light-emitting element enhances the color rendering of the white light-emitting element and controls its color temperature, thereby providing a warm white light-emitting element with high color rendering.

In accordance with one aspect of the present invention, the present invention provides a method of making a high color rendering white light solid phosphor, particularly a method of making a high color rendering white light solid phosphor using a ceramic phosphor or a glass phosphor. The method for producing a high color rendering white light solid phosphor comprises the following steps: (1) providing a solid phosphor, the solid phosphor is doped with a phosphor, so that the solid phosphor can absorb a light emitting component Part of the light excites a light to mix with the light emitted by the light-emitting element to produce white light; and (2) coats a red phosphor or an orange phosphor on one surface of the solid phosphor .

In accordance with another aspect of the present invention, the present invention provides a method of fabricating a high color rendering white light emitting device, particularly a method of fabricating a high color rendering white light emitting device from a ceramic phosphor or a glass phosphor. The method for producing a high color rendering white light emitting device comprises the steps of: (1) providing a substrate on which a light emitting element is disposed; and (2) disposing a solid phosphor on the light emitting element on the substrate. The solid phosphor is doped with a phosphor such that the solid phosphor absorbs a portion of the light emitted by the light-emitting element to excite a light to mix with the light emitted by the light-emitting element to produce white light; 3) Applying a red phosphor or an orange phosphor to one surface of the solid phosphor. Wherein, step (3) may be implemented after step (2) is completed, or step (3) may be implemented before step (2) is implemented.

Therefore, the present invention provides a method for fabricating a high color rendering white light solid phosphor and a high color rendering white light emitting element, which can effectively enhance the color rendering of the white light solid phosphor and the white light emitting element, and can effectively control the white light. The color temperature of the solid phosphor and white light emitting elements.

Some embodiments of the invention are described in detail below. However, the present invention may be widely practiced in other embodiments in addition to the detailed description. That is, the scope of the present invention is not limited by the embodiments of the present invention, and the scope of the patent application proposed by the present invention shall prevail. In the following, when the elements or steps in the embodiments of the present invention are described in a single element or step description, the present invention should not be construed as limiting, that is, the following description does not particularly emphasize the numerical limitation. The spirit and scope of application can be derived from the structure and method in which many components or structures coexist. In addition, in the present specification, the various parts of the elements are not drawn in full accordance with the dimensions, and some dimensions may be exaggerated or simplified compared to other related dimensions to provide a clearer description to enhance the understanding of the present invention. The prior art of the present invention, which is used in the prior art, is only referred to herein by reference.

1A through 1B are perspective flow charts of a high color rendering white light solid phosphor 100 according to an embodiment of the present invention, which shows the entire process and various process steps in a cross-sectional structure. Referring to FIG. 1A, first, a solid phosphor 102 is provided. The solid phosphor 102 is doped with at least one phosphor 104 uniformly doped or distributed in the solid phosphor 102, so that the solid phosphor The light body 102 can absorb a light-emitting element such as blue light (wavelength of 440 nm (nm) - 475 nm (nm)), violet light or ultraviolet light (wavelength of 350 nm (nm) - 400 nm (nm)) , or a laser, part of the light emitted to excite a light mixed with the light emitted by the light-emitting element to produce white light.

The solid phosphor 102 is a ceramic phosphor composed of a ceramic material and at least one phosphor powder, wherein the phosphor powder can be added to the ceramic material when calcined or made into a solid phosphor 102. It is uniformly distributed or doped in a ceramic material to form a ceramic phosphor. Alternatively, the solid phosphor 102 is a glass phosphor composed of a glass material and at least one phosphor powder, wherein the phosphor powder can be added to the glass when calcined or made into a solid phosphor 102 by a glass material. In the material, it is uniformly distributed or doped into the glass material to form a glass phosphor. The solid state phosphor 102 can be a solid fluorescent sheet, a solid fluorescent block, or other shapes, which can take various shapes according to requirements, which is not limited by the present invention.

The phosphor powder 104 doped or distributed in the solid phosphor 102 is a yellow-green phosphor or a yellow phosphor, or the phosphor 104 may also contain yellow-green phosphor and yellow phosphor. The yellow-green phosphor and the yellow phosphor are uniformly doped or distributed in the solid phosphor 102. The solid state phosphor 102 can be a solid fluorescent sheet, a solid fluorescent block, or other shapes, which can take various shapes according to requirements, which is not limited by the present invention.

Next, referring to the first B diagram, a red phosphor having a wavelength of 610 nm (nm) to 670 nm (nm) or a wavelength of 580 nm (nm) to 610 nm (nm) is used. The orange phosphor is coated on a surface of the solid phosphor 102, such as the upper surface or the lower surface, to form a red or orange phosphor film layer 106 on the solid phosphor 102. The red or orange phosphor film layer 106 provides a wavelength of 610 nanometers (nm) to 670 nanometers (nm) or 580 nanometers (nm) to 610 nanometers (nm) which is lacking in the solid phosphor 102. The spectrum, thereby enhancing the color rendering of the solid phosphor 102, produces a white color solid phosphor 100 of high color rendering.

The second figure is a flow chart of the steps of coating the surface of the solid phosphor or the orange phosphor on the solid phosphor 102 in the method for producing a high color rendering white solid phosphor according to the present invention, and further describes the first B diagram. The steps shown are detailed below. Referring to the second figure, the step of coating the red phosphor powder or the orange phosphor powder on the surface of the solid phosphor 102 shown in FIG. B includes the following steps: First, providing a surface having 610 nm (nm)-670 Nai A red phosphor of the (nm) wavelength or an orange phosphor having a wavelength of 580 nm to 610 nm (step 200). Then, the red fluorescent powder (or orange fluorescent powder) is uniformly mixed with a rubber material to prepare a fluorescent glue (step 202), wherein the rubber material can be silicone or epoxy. Or other glue can be glued. In step 202, the mixing ratio of the red fluorescent powder (or orange fluorescent powder) and the rubber material is 0.1%-50% (by weight), that is, the red fluorescent powder (or orange fluorescent powder) accounts for the fluorescent glue. 0.1%-50% by weight, and a preferred mixing ratio of red fluorescent powder (or orange fluorescent powder) to the rubber material is 0.8%-10% by weight. The mixing ratio of red phosphor (or orange phosphor) to the gel affects the 610 nm (nm)-670 nm (nm) wavelength or 80 nm (nm)-610 supplied to the solid phosphor 102. The intensity of the spectrum of the nanometer (nm) wavelength, in turn, affects the color rendering of the solid phosphor 102 and the color temperature of the solid phosphor 102. Therefore, the color rendering property and color temperature of the solid phosphor 102 can be controlled by changing the mixing ratio of the red phosphor powder (or orange phosphor powder) to the gum material.

Although in this embodiment, a single red fluorescent powder or a single orange fluorescent powder is uniformly mixed with a rubber to prepare a fluorescent glue, in other embodiments of the present invention, a plurality of red fluorescent colors may be used. Powder or a variety of orange phosphors are uniformly mixed with a rubber to prepare a fluorescent glue. Even in order to further improve color rendering and lower color temperature, red fluorescent powder, orange fluorescent powder and rubber can be uniformly mixed at the same time. It is prepared as a fluorescent glue.

Next, the phosphor is applied to one surface of the solid phosphor (step 204), such as the upper or lower surface. Step 204: spraying the fluorescent glue on one surface of the solid phosphor by spraying or dispensing, wherein the phosphor is coated on the solid phosphor to a thickness of 0.01 mm (mm) to 1 mm (mm). The preferred thickness of the phosphor coated on the solid phosphor is from 0.01 millimeters (mm) to 1 millimeter (mm). Finally, the phosphor paste applied to the surface of the solid phosphor 102 is dried (step 206), and a red or orange phosphor film layer 106 is formed on the surface of the solid phosphor 102. The red or orange phosphor powder layer 106 is exposed to light (for example, blue light (wavelength of 440 nm (nm) to 475 nm (nm)), violet or ultraviolet light (wavelength of 350 nm (nm) to 400 nm (nm) )), or laser irradiation, produces red light at a wavelength of 610 nm (nm) to 670 nm (nm) or orange light at a wavelength of 580 nm (nm) to 610 nm (nm).

The high color rendering white light solid phosphor 100 produced by the method of the present invention for producing a high color rendering white light solid phosphor (the first A diagram - the first B diagram and the method and the procedure shown in the second diagram) Irradiated by light (such as blue light (wavelength 440 nm (nm) - 475 nm (nm)), violet or ultraviolet light (wavelength of 350 nm (nm) - 400 nm (nm)), or laser) At this time, part of the light will excite the yellow-green phosphor (or yellow phosphor) 104 in the solid phosphor 102 to produce a yellow-green light (or yellow) having a wavelength of 510 nm (nm) to 575 nm (nm). Light), a portion of the light excites the red or orange phosphor film layer 106 on the surface of the solid phosphor 102 to produce a red light or wavelength having a wavelength between 610 nm and 670 nm. Orange light between 580 nm (nm) and 610 nm (nm), and the red light produced by the yellow-green (or yellow), red or orange phosphor film layer 106 produced by the solid phosphor 102 Or orange light, and residual light that is not absorbed by the solid phosphor 102 and the red or orange phosphor film layer 106, forms a white light.

The white light generated by the high color rendering white light solid phosphor 100 of the present invention is composed of yellow-green light (or yellow light) having a wavelength of 510 nm (nm) to 575 nm (nm) and a wavelength of 610 nm ( Red light between nm) and 670 nanometers (nm) or orange light with a wavelength between 580 nanometers (nm) and 610 nanometers (nm), and a wavelength between 440 nm and 475 nm ( The blue light between nm or the violet (or ultraviolet) light having a wavelength between 350 nm and 400 nm (nm), so the white light spectrum is almost across all visible wavelengths, and is supplemented. The spectrum of the high-wavelength band lacking by white light generated by the solid-state phosphor 100, such as red light having a wavelength between 610 nm (nm) and 670 nm (nm) or a wavelength of 580 nm (nm) - Orange light between 610 nanometers (nm), so the high color rendering white light solid phosphor 100 of the present invention can greatly enhance white light compared to the solid phosphor 102 (for example, ceramic phosphor or glass phosphor) The color rendering is improved, and the color rendering is improved to between 80 and 99, and the high color rendering (CRI > 80) is required. Conversely, the white light produced by the solid-state phosphor 102 (for example, a ceramic phosphor or a glass phosphor) is irradiated with light, and is yellow-green (or yellow) having a wavelength of 510 nm (nm) to 575 nm (nm). And a mixture of blue light having a wavelength between 440 nanometers (nm) and 475 nanometers (nm) or violet light (or ultraviolet light) having a wavelength between 350 nanometers (nm) and 400 nanometers (nm). Therefore, there is a lack of spectral composition of low color temperature and long wavelength, such as red light with a wavelength of 610 nm (nm) - 670 nm (nm), orange with a wavelength of 580 nm (nm) - 610 nm (nm) Light, therefore, its color rendering can only reach 65-75, and can not achieve high color rendering (CRI > 80).

In other words, the method of the present invention for producing a high color rendering white light solid phosphor is carried out on a surface (for example, an upper surface or a lower surface) of a solid phosphor 102 (for example, a ceramic phosphor or a glass phosphor). Coating a red light, such as blue light, violet light (or ultraviolet light), or laser, will illuminate a red luminescent red phosphor of 610 nm (nm) to 670 nm (nm), or a received light ( For example, blue, violet (or ultraviolet), or laser illumination illuminates an orange phosphor that emits orange light at a wavelength of 580 nanometers (nm) to 610 nanometers (nm), while the supplemental solid phosphor 102 is exposed to light ( For example, blue light, violet light (or ultraviolet light), or laser light, the white light spectrum produced by the spectrum is lacking 610 nm (nm) - 670 nm (nm) wavelength or 580 nm (nm) - 610 nm (nm Spectral illumination of the wavelength, thereby increasing the color rendering property of the solid phosphor 102 (white light generated by light irradiation) from the original 65-75 to 80 or higher, thereby achieving high color rendering (CRI > 80). A high color rendering white light solid phosphor 100 which can be irradiated with light to emit high color rendering white light is produced. Even in order to further enhance the color rendering of the solid phosphor 102 while irradiating light (for example, blue light, violet light (or ultraviolet light), or laser light), it will excite a wavelength of 610 nm (nm) to 670 nm (nm). Red red fluorescent powder, as well as light-emitting (such as blue, violet (or ultraviolet), or laser), will illuminate the orange fluorescence of 580 nanometers (nm) to 610 nanometers (nm) The powder is coated on the surface of the solid phosphor 102 while supplementing the 610 nm (nm) lacking in the white light spectrum produced by the solid phosphor 102 upon exposure to light such as blue light, violet light (or ultraviolet light, or laser light). -670 nm (nm) wavelength and 580 nm (nm) - 610 nm (nm) wavelength spectrum, thereby greatly improving the color rendering of the solid phosphor 102 (white light generated by light irradiation), and produced a A high color rendering white light solid phosphor 100 that emits higher color rendering white light by light irradiation.

Furthermore, the white light generated by the solid-state phosphor 102 (for example, a ceramic phosphor or a glass phosphor) is irradiated with light, and is yellow-green light (or yellow light having a wavelength of 510 nm to 575 nm). And high color temperature such as blue light having a wavelength between 440 nm (nm) and 475 nm (nm) or violet light (or ultraviolet light) having a wavelength between 350 nm (nm) and 400 nm (nm) Light is mixed, so there is a lack of spectral composition of low color temperature and long wavelength, such as red light with a wavelength of 610 nm (nm) - 670 nm (nm), wavelength of 580 nm (nm) - 610 nm ( Nm) orange light, so its color temperature is often cold, mostly between 10000 °K -5000 °K, or even more than 10000 °K, therefore, the white light produced by it is a cool white light and not suitable for everyday use illumination. However, the white color composition (spectrum) generated by the high color rendering white solid fluorescent body 100 produced by the method for producing a high color rendering white solid fluorescent body of the present invention contains light having a low color temperature and a long wavelength. (for example, red light with a wavelength of 610 nm (nm) to 670 nm (nm), orange light with a wavelength of 580 nm (nm) to 610 nm (nm), or both), so further Reducing the color temperature of the white light produced by it can be reduced to 2000 °K at the lowest, thus producing a warm white light suitable for daily illumination.

In addition, since the white light generated by the high color rendering white solid fluorescent body 100 is irradiated by yellow-green light (or yellow light) having a wavelength of 510 nm (nm) to 575 nm (produced by the solid fluorescent body 102) Red light with a wavelength between 610 nanometers (nm) and 670 nanometers (nm) or orange light with a wavelength between 580 nanometers (nm) and 610 nanometers (nm) (red or orange phosphor film) Blue light (or ultraviolet light) having a wavelength between 440 nanometers (nm) and 475 nanometers (nm) or a wavelength between 350 nanometers (nm) and 400 nanometers (nm) (mixed by the light source), so that it can be controlled and changed by the red or orange phosphor film layer 106 in the high color rendering white light solid phosphor 100 (or on the surface of the solid phosphor 102) The amount of red or orange phosphor, while controlling and changing the wavelength between 610 nm (nm) and 670 nm (nm) of red light or wavelength between 580 nm (nm) and 610 nm (nm) The ratio of the orange light in the white light, in turn, controls and changes the color rendering and color temperature of the white light produced by the high color rendering white light solid phosphor 100.

In other words, in the method of the present invention for producing a high color rendering white light solid phosphor (the first A map - the first B map and the method and the step shown in the second graph), in the step shown in the first B graph Controlling and changing the color rendering and color temperature of the white light generated by the high color rendering white light solid phosphor 100 by light irradiation by controlling and changing the amount of red or orange phosphor applied on the surface of the solid phosphor 102, Or in step 202 of the second figure, changing the mixing ratio of the red phosphor powder or the orange phosphor powder to the gel material, the amount of red or orange phosphor powder coated on the surface of the solid phosphor 102 can be changed. Further, the color rendering property and the color temperature of the white light generated by the light irradiation of the high color rendering white solid fluorescent body 100 are controlled and changed. For example, when the mixing ratio of the red fluorescent powder or the orange fluorescent powder to the rubber is 0.8% to 3%, the color rendering of the white light produced by the high color rendering white solid fluorescent body 100 produced by the light is produced. Sex can reach 80-99. When the mixing ratio of the red fluorescent powder or the orange fluorescent powder to the rubber is 0.8%-0.9%, the color temperature of the white light produced by the high color rendering white solid fluorescent body 100 produced by the light can reach 6000°. K. When the mixing ratio of the red fluorescent powder or the orange fluorescent powder to the rubber material is 2% to 3%, the color temperature of the white light generated by the high color rendering white solid fluorescent body 100 produced by the light can reach 4000°. K. When the mixing ratio of the red fluorescent powder or the orange fluorescent powder to the rubber is 3% to 5%, the color temperature of the white light produced by the high color rendering white solid fluorescent body 100 produced by the light can reach 3000°. K. When the mixing ratio of the red fluorescent powder or the orange fluorescent powder to the rubber is 5%-8%, the color temperature of the white light produced by the high color rendering white solid fluorescent body 100 produced by the light can reach 2200°. K-2000 °K. That is, when the mixing ratio of red fluorescent powder or orange fluorescent powder to the rubber material is higher, low color temperature and long wavelength light (for example, red light having a wavelength of 610 nm (nm) to 670 nm (nm) or The orange light having a wavelength of 580 nm (nm) to 610 nm (nm) accounts for a larger proportion of the white light generated by the high color rendering white light solid phosphor 100 produced by the white light, so the color rendering of white light will be The higher the color temperature is, the lower the color temperature will be. By controlling and changing the mixing ratio of the red fluorescent powder or the orange fluorescent powder to the rubber material, the method for producing a high color rendering white light solid phosphor of the present invention can produce a color temperature covering white light. High color rendering white light solid phosphor with a spectrum between 10000 °K and warm white light 2000 °K.

In addition, the present invention further provides a method for high color rendering white light emitting device, in particular, a high color rendering solid phosphor 100 produced by the method shown in FIG. 1A to FIG. The method. 3A through 3C are perspective flow charts of a method of fabricating a high color rendering white light emitting device according to an embodiment of the present invention, which shows the entire process and various process steps in a cross-sectional structure. First, referring to FIG. 3A, first, a substrate 302 is provided, wherein a light-emitting element 304 is disposed on the substrate 302. The substrate 302 can be a substrate or a wafer, and the light-emitting element 304 can be a blue light-emitting element (such as a blue light-emitting diode), a violet light-emitting element (such as a violet light-emitting diode), or a laser. (element).

Referring to FIG. 3B, a solid phosphor 102 is disposed over the light-emitting element 304 on the substrate 302, particularly above the light-emitting surface of the light-emitting element 304, and the light-emitting element 304 is placed on the substrate 302. Between the solid state phosphor 102 and the solid state. The solid state phosphor 102 comprises at least one phosphor powder 104 (eg, yellow-green phosphor or yellow phosphor) uniformly doped or distributed in the solid phosphor 102 such that the solid phosphor 102 can absorb A part of the light emitted by the light-emitting element 304, such as blue light, violet light, or laser light, excites a colored light, such as yellow-green light or yellow light, to mix with the light emitted by the light-emitting element 304, thereby generating a color temperature deviation. Cold cold white light. The material, composition, and shape of the solid phosphor 102, and the material and composition of the phosphor powder 104 have been described in detail in the foregoing (described in relation to FIG. 1A), and thus will not be described herein.

Then, referring to the third C diagram, a red phosphor having a wavelength of 610 nm (nm) to 670 nm (nm) or a wavelength of 580 nm (nm) to 610 nm (nm) is used. The orange phosphor is coated on a surface of the solid phosphor 102, such as the upper surface, and a red or orange phosphor film layer 106 is formed on the solid phosphor 102 to form a high color rendering white light. Element 300. The red or orange phosphor film layer 106 is illuminated by light (such as blue light, violet light (or ultraviolet light), or laser light) to excite red light at 610 nm (nm) to 670 nm (nm) or 580. Nano (nm) - 610 nanometer (nm) wavelength of orange light.

As shown in FIG. B, a red or orange phosphor is applied to a surface of the solid phosphor 102, and a red or orange phosphor is applied to the solid phosphor as shown in FIG. Steps on a surface of the body 102 may be performed on the surface of the solid phosphor 102 by a red or orange phosphor on the surface of the solid phosphor 102 by the method and the steps shown in the second figure to form a red or orange phosphor film layer 106. These methods and steps have been described in detail above, and therefore, they are not described herein. In addition, in the embodiment shown in FIG. 3A to FIG. 3B, although the solid phosphor 102 is first disposed on the substrate 302 (step shown in FIG. B), the red or orange color will be used. The phosphor powder is coated on one surface of the solid phosphor 102 to form a red or orange phosphor film layer 106 (the step shown in FIG. 3C), but in other embodiments of the present invention, After the red or orange phosphor powder is coated on one surface of the solid phosphor 102 to form the red or orange phosphor powder layer 106, a method is first described in the first A-first B diagram. After the high color rendering white light solid phosphor 100 is applied, the solid phosphor 102 (ie, the high color rendering white solid phosphor 100) having the red or orange phosphor film layer 106 formed on the surface is disposed on the substrate 304. .

In addition, in the embodiment shown in the third A-third diagram, the high color rendering white light-emitting element 300 is coated with red or orange phosphor on the upper surface of the solid phosphor 102, A red or orange phosphor film layer 106 is formed on the upper surface of the solid phosphor 102 such that the light emitted by the light-emitting element passes through the solid phosphor 102 and is excited to emit yellow-green or yellow light before it is irradiated to red or The orange phosphor powder layer 106 is excited to emit red or orange light. However, in other embodiments of the present invention (such as the high color rendering white light emitting device 300' shown in FIG. 4), red or orange phosphor powder may be applied to the lower surface of the solid phosphor 102, and A red or orange phosphor film layer 106 is formed on the lower surface of the solid phosphor 102 such that the light emitted by the light-emitting element passes through the red or orange phosphor film layer 106 and is excited to emit red or orange light. The solid phosphor 102 is illuminated to excite it to emit yellow-green or yellow light. However, although the method for fabricating a high color rendering white light emitting device of the present invention may adopt the design of the high color rendering white light emitting device 300 shown in FIG. C or the high color rendering white light emitting device shown in FIG. 300' this design, but because of the high color rendering white light emitting device 300, this design is 30%-40% more bright than the high color rendering white light emitting device 300', so high color rendering is required in a large brightness. The white light-emitting element is still preferably configured in such a configuration that the high color rendering white light-emitting element 300 is employed.

The high color rendering white light emitting device 300 emits light by the light emitting element 304, such as blue light (wavelength of 440 nm (nm) - 475 nm (nm)), violet light or ultraviolet light (wavelength of 350 nm (nm) -400 nm (nm), or laser, to excite solid-state phosphors 102 (such as ceramic phosphors or glass phosphors) in the high color rendering white light-emitting element 300 to produce wavelengths at 510 nm (nm) - 575 nanometers (nm) of yellow-green light (or yellow light), and excitation of a red or orange phosphor powder layer 106 coated on the surface of the solid phosphor 102 to produce a wavelength of 610 nm (nm) - 670 奈Red light between meters (nm) or orange light with a wavelength of 580 nm (nm) to 610 nm, and a yellow-green (or yellow), red or orange phosphor powder layer emitted by solid-state phosphor 102 106 emits red or orange light, and the light emitted by the light-emitting element 304 is mixed into a white light. The white light emitted by the high color rendering white light emitting device 300 includes a wavelength of 610 nm (nm) to 670 nm (nm) or 580 nm (nm) to 610 nm (nm) which is lacking in the solid phosphor 102. The spectrum (low color temperature and long wavelength spectrum), therefore, the white light spectrum emitted by the high color rendering white light emitting element 300 covers almost all visible light spectrum, so it has higher color rendering (CRI > 80), and its color temperature can also Also, the effect is lowered, and even the color temperature thereof can be lowered to the color temperature range of the warm white light. Therefore, the high color rendering white light-emitting element 300 fabricated by the method of the present invention (the method shown in the third to third C-pictures) 300 It is a light-emitting element that can produce high color rendering and low color temperature white light. The principle and mechanism of illumination of the high color rendering white light emitting device 300 are the same as those described above for generating white light by the principle and mechanism of the high color rendering solid state phosphor 100, and have been described in detail above, and thus will not be described herein.

In the method for producing a high color rendering white light solid phosphor of the present invention (the first A diagram - the first B diagram and the method and the step shown in the second diagram), the high color rendering white light emitting device of the present invention is produced. The method can also control and change the color rendering property of the white light generated by the high color rendering white light solid phosphor 100 by light irradiation by controlling and changing the amount of red or orange phosphor applied on the surface of the solid phosphor 102. Color temperature. That is, the method of producing a high color rendering white light-emitting element of the present invention changes the mixing ratio of the red fluorescent powder or the orange fluorescent powder to the rubber material, and can change the red color applied on the surface of the solid fluorescent body 102 or The amount of the orange phosphor is controlled to change the color rendering and color temperature of the white light generated by the high color rendering white light solid phosphor 100. These methods of controlling and changing the color rendering and color temperature of white light have been described in detail above and will not be described herein.

In view of the above embodiments, the present invention provides a method for fabricating a high color rendering white light solid phosphor and a high color rendering white light emitting element, which can effectively enhance the color rendering of the white light solid phosphor and the white light emitting element, and can be effective The color temperature of the white light solid phosphor and the white light emitting element is controlled to make it more suitable for daily illumination.

100‧‧‧High color rendering white light solid phosphor

102‧‧‧Solid luminescent body
104‧‧‧Fluorescent powder
106‧‧‧Red or orange fluorescent powder coating
200-206‧‧‧ coated red fluorescent powder or orange fluorescent powder in solid fluorescent body
Steps in the surface process of 102‧‧‧
300, 300'‧‧‧High color rendering white light emitting elements
302‧‧‧Substrate
304‧‧‧Lighting elements

1A through 1B are cross-sectional flowcharts showing a method of fabricating a high color rendering white light solid phosphor according to an embodiment of the present invention. The second figure is a flow chart of the step of coating red fluorescent powder or orange fluorescent powder on the surface of the solid fluorescent body in the method for producing a high color rendering white solid fluorescent body of the present invention. 3A to 3C are cross-sectional flowcharts showing a method of fabricating a high color rendering white light emitting device according to an embodiment of the present invention. The fourth figure is a schematic view of a high color rendering white light emitting device according to another embodiment of the present invention.

100‧‧‧High color rendering white light solid phosphor

102‧‧‧Solid luminescent body

104‧‧‧Fluorescent powder

106‧‧‧Red or orange fluorescent powder coating

Claims (23)

A method for producing a high color rendering white light solid phosphor comprises: (1) providing a solid phosphor, wherein the solid phosphor is doped with a phosphor such that the solid phosphor absorbs a light emitting element Part of the light excites a light to be mixed with the light emitted by the light-emitting element to generate white light, wherein the solid phosphor is a ceramic material and a ceramic phosphor or a glass material composed of the phosphor powder. And a glass phosphor composed of the phosphor; and (2) coating a red phosphor or an orange phosphor on the surface of one of the solid phosphors. A method of producing a high color rendering white light solid phosphor according to the first aspect of the patent application, wherein the phosphor powder comprises yellow-green phosphor powder or yellow phosphor powder, or both. The method for producing a high color rendering white light solid phosphor according to claim 1, wherein the step (2) comprises: providing the red phosphor or the orange phosphor; the red phosphor or The orange fluorescent powder is uniformly mixed with a rubber material to prepare a fluorescent glue; coating the fluorescent glue on one surface of the solid fluorescent body; and drying the coating on the surface of the solid fluorescent body Fluorescent glue. The method for producing a high color rendering white light solid phosphor according to claim 3, wherein the red fluorescent powder or the mixing ratio of the orange fluorescent powder to the rubber is 0.1% to 50%. A method of producing a high color rendering white light solid phosphor according to claim 4, wherein the red fluorescent powder or the mixing ratio of the orange fluorescent powder to the rubber is 0.8% to 10%. A method of producing a high color rendering white light solid phosphor according to claim 3, wherein the glue is silicone or epoxy. The method for producing a high color rendering white light solid phosphor according to claim 3, wherein the step of coating the phosphor on one surface of the solid phosphor is sprayed or dispensed A fluorescent gel is coated on the surface of the solid phosphor. A method of producing a high color rendering white light solid phosphor according to the third aspect of the invention, wherein the phosphor is coated on the solid phosphor to have a thickness of 0.01 mm (mm) to 1 mm (mm). A method of producing a high color rendering white light solid phosphor according to the invention of claim 8, wherein the phosphor is coated on the solid phosphor to have a thickness of 0.01 mm (mm) to 1 mm (mm). A method for fabricating a high color rendering white light emitting device, comprising: (1) providing a substrate having a light emitting element disposed thereon; and (2) disposing a solid phosphor above the light emitting element on the substrate The solid phosphor is doped with a phosphor, such that the solid phosphor absorbs a portion of the light emitted by the light emitting element to excite a light to be mixed with the light emitted by the light emitting element to generate white light. The solid phosphor is a ceramic material and a ceramic phosphor composed of the phosphor or a glass material and a phosphor composed of the phosphor; and (3) coating a red phosphor or An orange phosphor is on the surface of one of the solid phosphors. The method of high color rendering white light-emitting element according to claim 10, wherein the light-emitting element is a blue light-emitting element, a violet light-emitting element, or a laser. The method of producing a high color rendering white light emitting device according to claim 10, wherein the phosphor powder comprises the phosphor powder comprising yellow-green phosphor powder or yellow phosphor powder, or both. A method of producing a high color rendering white light-emitting device according to claim 10, wherein the step (3) is carried out after the completion of the step (2). A method of producing a high color rendering white light-emitting device according to claim 10, wherein the step (3) is carried out before the step (2) is carried out. The method for producing a high color rendering white light emitting device according to claim 10, wherein the step (3) comprises: providing the red phosphor or the orange phosphor; the red phosphor or the orange Fluorescent powder is uniformly mixed with a rubber material to prepare a fluorescent glue; coating the fluorescent glue on one surface of the solid phosphor; and drying the fluorescent coating on the surface of the solid phosphor gum. The method for producing a high color rendering white light-emitting device according to claim 15, wherein the red fluorescent powder or the mixing ratio of the orange fluorescent powder to the rubber material is 0.1% to 50%. The method for producing a high color rendering white light-emitting device according to claim 16, wherein the red fluorescent powder or the mixing ratio of the orange fluorescent powder to the rubber is 0.8% to 10%. A method of producing a high color rendering white light-emitting element according to claim 15 wherein the glue is silicone or epoxy. The method for producing a high color rendering white light emitting device according to claim 15, wherein the step of coating the phosphor on the surface of the solid phosphor is sprayed or dispensed. The glue is applied to the surface of the solid phosphor. A method of producing a high color rendering white light-emitting device according to the fifteenth aspect of the invention, wherein the phosphor paste is applied to the solid phosphor having a thickness of 0.01 mm (mm) to 1 mm (mm). A method of producing a high color rendering white light-emitting device according to claim 20, wherein the phosphor is coated on the solid phosphor to have a thickness of 0.01 mm (mm) to 1 mm (mm). A method of producing a high color rendering white light-emitting device according to claim 10, wherein the red phosphor or the orange phosphor is coated on the upper surface of the solid phosphor. A method of producing a high color rendering white light-emitting element according to claim 10, wherein the red phosphor or the orange phosphor is coated on a lower surface of the solid phosphor.