TWI247436B - White light-emitting device - Google Patents

Abstract

This invention relates to a white light-emitting device, which comprises a plurality of blue-light LEDs, a plurality of red-light LEDs, and a phosphor. The blue-light LED emits blue light. The red-light LED emits red light. The phosphor is formed by mixing a green-yellow phosphor and a blue phosphor and may absorb the blue light, such that it is excited to emit a first mixed light with different wavelength from that of the blue light. The red lights emitted by the first mixed light and the red LED are further mixed to emit the second mixed light so as to achieve the main goal of obtaining the second mixed light with good color rendering and color saturation.

Description

The combined light of the blue light wavelength of the phosphor" Another color of the fluorescent light LE yellow light, red light L "Traditional one - another red light mixed with its main, that is, in the body, blue D emits blue light and EDS Mixed light, that is, a blue light that provides a color fluorescent body to red light, etc.

Page 5 Field] A white light-emitting device, specifically one that can be released for release. The patent case of the Taiwan Patent No. "Light-emitting device and display device" applied for by the company, the blue light semiconductor of the light source, which emits white light of different wavelengths due to the emitted blue light, Unexcited blue light is mixed, so its color rendering is impure. The white light emitting device and the blue phosphor respectively excite the phosphor "different light", which can achieve the purpose of color rendering and color saturation. 1247436 Case No. 93111734 V. Invention Description (1) [Technical Field of the Invention] The present invention provides a second mixed light with good color properties [Prior Art] According to the conventional light-emitting device, the Japanese Chemical Engineering No. 383508 Only a single blue color is used to excite the yellow fluorescent layer, and a single wavelength of light is partially different, that is, white light distortion. [Invention] The present invention provides a green yellow and blue and red color by a green-yellow light LED. Light LED is good. "Second mixing. The phosphor of the present invention is composed of green and yellow. The blue body is excited by the green first mixed light and the saturation of the color is excellent. The mixture is mixed with blue, and the phosphor is excited to emit the first mixed light. The white light emitting device mixes the phosphor with the red phosphor to make the fluorescent first long mixed light. Color rendering and color can be obtained for another purpose. !247436 ΛΜ 93111734 V. Inventive Note (2), the light-emitting element is added to set up a younger-mixed light mixing, which can be used for another purpose. The present invention provides a white light emitting LED1Q which can emit blue ray correction. The at least one phosphor is mixed with each other (Aluminate) is a fluorescent material.俾 absorbable blue 1 5 wavelength is not LED 2 0 9 0; where the green and yellow of the firefly m. (such as the blue fluorescence wavelength between the two more than 80 ° red 50 is from green The material composition is: the light body 5 3 is made of eucalyptus (Eu); the body 50 is lighted by 5 5, so that the same younger brother is mixed with the red light body 5 0 light 5 2 1, as shown in FIG. The light body 5 3 is 4 5 0 〜 5 green yellow LED, and the green yellow light emitted by it is mixed with the second color mixing and color saturation. In a possible embodiment, the light device comprises at least one or more blue light light 15; the light LED 20 emits red light 25; the yellow phosphor 5 2 and the blue phosphor 5 3 green yellow phosphor 5 2 are made of aluminum The acid salt is composed of cerium (Ce); a salt of a salt (A 1 um i nate ) material, which is coated on the upper surface of the blue LED 1 ,, and the phosphor 5 is A green-yellow phosphor 5 that is combined with the blue light and condensed with the blue light, the first mixed light 8 and the red light 2 5 are mixed to release the second mixed light, and the selected wavelength is between 50 〇. ~r β η blue light 1 5 is excited by blue light between 500 nm; the wavelength of light is combined to form the first selected mixed light

1247436

Case 5 Tiger 93111734 £, invention description (3) According to the description of the main county micro, 4 concentric soil is imitation, as shown in Figure 8, in which the 550 material,: add a red light body 5 work Mixed with the original green 'color phosphor 5 2 and the color illuminator 5 q phase, 0 person ^ ^ 踅 餸 DJ; the red phosphor 5 1 is excited by the blue light 15 5丄丄, the selected wavelength is between 585~700nm. According to the main features described in the above, a greenish yellow L E D 30 ' can be added to emit green yellow light 35 with a selected wavelength between 500 and 5 8 5 n m (as shown in FIG. 8). According to the foregoing main features (as shown in FIG. 3), wherein the light source is blue light 15 and the selected light emitting wavelength is between 4 〇〇 and 48 〇 1 ^, and the light source is red light 2 5 and the selected light wavelength is selected. Between 5 8 5~7 8 〇nm. According to the main features mentioned above, the green yellow, blue and red glomeriums 5 2, 5 3, 5 1 in the phosphor 5 can be selected from the following materials in combination or in combination: (1). Aluminate (2)·Citrate system; (3). Phosphate system; (4). Borate system; (5) Sulfide system. [Embodiment] (1). As shown in the figure - 'Blue LED10 and red LED2' are installed::; Cap 6 ,, where the upper surface of the blue LED 10, the body 5 〇, and then transparent 6 5 is packaged in the recess 6" of the reflective cover 60, to encapsulate the blue LED1 (^.= ”20. The electrodes are applied to the blue light Ledi〇 and the red light l ED 2 0; as shown in Fig. 2, the light is D work combination

Blue light with a wavelength of 400~48〇ηΓΤ1ί^γ τ , κ 曰____i m is emitted; fluorescent 1247436 • Case number 93111734_年月曰 _ _ V. Invention description (4) Body 5 0 is composed of green yellow firefly The light body 5 2 and the blue phosphor 5 3 are mixed, wherein the green yellow phosphor 52 absorbs a part of the blue light 15 and is excited to have a wavelength of 5 0 0 5 5 5 5 nm. Between the green yellow light 5 2 1 , the blue phosphor 5 3 absorbs a part of the blue light 15 and is excited by the blue light 5 3 1 having a wavelength between 450 and 500 nm, and the green yellow is excited. The mixing of light 5 2 1 and two different wavelengths of blue light 5 3 1 to form first mixed light 80 is released. The red LED 20 emits red light 2 5 having a wavelength between 585 and 780 nm, and the red light 2 5 is mixed with the first mixed light 80 to obtain a second mixed light 90. As shown in Figure 3, the light source is a blue light wave and a red light light 5 and the excited green light yellow light 5 2 1 and blue light 5 3 1 are independent and unmixed waveforms. Blu-ray 1 5, red light 2 5 and passively-emitting green yellow light 5 2 1 and blue light 5 3 1 have specific "wavelength" and "luminous intensity". The fourth figure is not a mixture of blue light 1 5, red light 2 5 and green yellow light 5 2 .1 and blue light 5 3 1 , and the second mixed light 90 is mixed to form an integrated wavelength average. The value is between 4 0 0 and 7 0 0 nm. Please refer to Figure 4 for the second mixed light 90 to compare with the solar spectrum 9 5 (ie natural light) shown by the imaginary line. 0 and the solar spectrum 9.5 are extremely high in color rendering in the visible region between 4 0 0 and 600 nm, so the second mixed light 90 achieved in this case is closer to the color rendering of the color (such as white light). Natural light, and the saturation of color is good. (2). The phosphor 50 is basically composed of green-yellow phosphor 5 2 and blue fluorescent light.

1247436 _ Case number 93111734 V. Invention description (5) Year Month Day

The body 5 3 is uniformly mixed, and the two have different light color reactions depending on the elemental composition "proportion value 1", and the light-induced color of the green-yellow phosphor 5 2 is green yellow light, blue fluorescent light The light-receiving color of the body 53 is blue light, so the green yellow phosphor 5 2 and the blue phosphor 5 3 can be selected from the same material elements, but the composition ratios of the two components are different, that is, different photo-induced colors are generated. The material of the phosphor 5 本 in this case may be a combination of one or more of the following elements: (1). Aluminate (Aluminate); (2). Silicates (Silicates); (3). Stone dance Phosphates; (4). Bornates; (5) Sulfate (S u 1 fides). Figure 5 is another preferred embodiment of the present invention. In the fluorescent _50, a mixture of another red phosphor 5 1 may be added, wherein the 矣 color phosphor 5 1 is composed of MgF2 · MgO · Ge02 : Μη material, and the green yellow fluorescent light described above The body 5 2 and the blue phosphor 5 3 are mixed; thereby, when the phosphor 50 is excited by the blue light source, f is excited by red light 5 1 1 , blue light 5 3 1 and green yellow 5 2 1 y is mixed into the first mixed light 8 0 /, so the first mixed light 8 〇> is provided with mixed light having different wavelengths of red light 5 1 1 , blue light 5 3 1 and green yellow light 5 2 1 . The light wavelength of red light 5 1 1 is between 5 8 5 and 700 nm, as shown in FIG. 6 , the light source is blue 丄 5 , red light 2 5 and green yellow light 3 5 are independent and unmixed before the skin The long region and the relative luminous intensity, as well as the excited blue light 5 3 ^ • long region and relative luminous intensity, the sixth figure shows that the different light of the 丄 &Tan; Tan has a specific oil county for the 硌 also.

Excited green yellow light 5 2 1 and excited red light 5 ] Ί 秘 secret 1247436 _ case number 93111734_ 年月曰 _ _ 5, invention description (6) Figure 9 is another comparison of this case A preferred embodiment wherein the phosphor layer 50 is directly packaged on the green yellow LED 30, the red LED D20, and the blue LED 10. In the case of the reflective cover 60, a green-yellow LED 3 0 is selected to select a green yellow light 3 5 having a wavelength between 5 0 0 and 5 8 5 nm as another light source, as shown in FIG. As shown, the three light sources such as green yellow light 3 5, red light 2 5 and blue light 15 are mixed with the first mixed light 8 0 > to obtain a curve of the second mixed light 90 / wavelength thereof. As shown in the seventh figure, by comparing the waveforms of the second mixed light 9 0 > 90 in the seventh and fourth figures, it can be seen that the second mixed light 9 0 in the seventh figure is increased by red. The intensity of the waveform of the light portion 5 and the intensity of the waveform of the green yellow light 3 5 are increased, so that the second mixed light 9 0 > in the seventh figure is compared with the solar spectrum 9 5 (ie, natural light), and the second mixed light is known. The similarity rate of 9 0 / with the solar spectrum 9 5 in the visible region between 40 0 and 600 nm is extremely high, so the color of the second mixed light 90 - its color (such as white light) is closer to natural light. The color saturation is better.

Page 10 1247436 _ Case No. 93111734_年月曰 Correction _ Schematic description of the drawing [Simple description of the drawing] The first figure is a sectional view of the device of the present invention. The second figure is a flow block diagram of the color mixing of the present invention. The third figure is a graph of independent optical wavelengths of the luminous L E D active illumination and the fluorescent passive illumination of the present invention. Fourth, the graph is a graph of the second mixed wavelength of the present invention. The fifth figure is a block diagram of the color mixing process after the red phosphor is added to the phosphor of the present invention. The sixth graph is a graph comparing the second mixed wavelength of the present invention with the day 1 i ght waveform. The seventh figure is a graph showing the second mixed wavelength of the passive red light and the green yellow light source mixed according to the present invention. Figure 8 is a block diagram of a flow of another embodiment of the present invention. Figure 9 is a cross-sectional view showing another embodiment of the apparatus of the present invention. [Main component symbol description] Blu-ray LE D--- 1 0 Blu-ray one-one - 1 5 Red light LE D--- 2 0 Red light one - 2 5 Green yellow LE D-- 3 0 Phosphor 1 - 5 0 red fluorescent n--- 5 1

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Claims (1)

1247436 1 · A white light emitting device comprising: at least one or more blue LEDs emitting blue light; at least one red LED emitting red light; the phosphor is a green yellow phosphor and blue fluorescent The light body is mixed with each other, wherein the green-yellow phosphor is composed of an aluminate (Aluminate) material, and the activator is cerium (Ce); the color-reading light reading body is composed of an aluminate (Aluminate) material. The living material is 铕 (Eu); 〃 the fluorescent system is coated on the upper surface of the blue LED, and the yttrium can absorb, earth, and the phosphor is excited to emit a first mixed light having a wavelength different from the blue light. The first mixed light is mixed with the red light emitted by the red LED to release the second mixed light; /, the green yellow light in the 3 reading body is excited by the blue light + blue, and the wavelength Between 5 0 0 and 5 8 5 nm; the blue light excited by the blue light of the phosphor has a wavelength between 4 5 〇 and b 〇 0 nm; σ hai combines light wavelengths of different colors to form The white light described in item 1 of the first mixed light is mixed with a red fluorescent light body; Between 5 8 • According to the patent application range, the red light emitted by the colorable phosphor and the blue fluorescent light, the intercalating light emitting device, wherein the body and the original green yellow are red fluorescent The white light emitting device according to the first or second aspect of the patent scope is claimed by the blue 5~7 00 nm 1247436 _ Case No. 93111734_年月日日_Amendment _ VI. Patent application scope A green-yellow LED can be added to emit green-yellow light with a wavelength of between 5 0 0 and 5 8 5 nm. 4. The white light emitting device according to claim 1, wherein the light source is blue light, the selected light emitting wavelength is between 4 0 0 and 48 nm, and the light source is red light, and the selected light wavelength is between 5 8 5~ 7 8 0 nm. 5. The white light emitting device according to claim 1 or 2, wherein the greenish yellow, blue and red phosphors in the phosphor are selected from the following materials in a single or combined manner: (1). Aluminum Acid salt system; (2). citrate system; (3) phosphate system; (4). borate system; (5). sulfide system. Page 14