TW200903866A - Glass coated light emitting element, illuminator and projector - Google Patents

Abstract

A glass coated light emitting device in which the emission light from a semiconductor light emitting element can be introduced efficiently into an optical control section, alignment of a lens and the light emitting element is not required, and the emission light from the semiconductor light emitting element can be taken out and utilized efficiently.; The glass coated light emitting device comprises a semiconductor light emitting element (1) mounted on the surface of a substrate and emitting light in a predetermined wavelength band from a light emitting region, a glass (2) having a part of a spherical surface wider than the hemispherical surface as the light emitting surface, integrated to cover the light emitting region of the semiconductor light emitting element (1) under a state the surface other than the spherical surface arranged facing the semiconductor light emitting element (1) and having a refractive index of 1.7 or above at the emission peak wavelength and the maximum diameter ratio of the substrate surface of semiconductor light emitting element to its diameter being 1.8 or above, and a bonding face (2A), i.e. a light scattering portion, for refracting the light existing in the glass (2) without exiting the surface thereof.

Description

200903866 IX. Description of the Invention: [Technical Field] The present invention relates to a semiconductor light-emitting element coated with glass, relating to a glass-coated light-emitting element, an illumination device, and a projection device. [Prior Art] A semiconductor light-emitting element represented by a polar body (LED, Light Emitting Diode) has characteristics such as small size, high efficiency, and long service life, and is used for various purposes. For example, if an LED is used for a projection light source, the LED can be miniaturized, and the illumination system can be miniaturized. On the other hand, since the LED emits light without directivity, it is necessary to efficiently emit the light into the liquid crystal panel and micro A light control unit such as a mirror array. Conventionally, in order to efficiently introduce such light-emitting light into light control, the lens light-emitting elements are individually produced into various lenses having a radiation angle or intensity distribution, and are aligned with light-emitting elements such as LEDs via a holder such as a metal. Position and adjust the fixer. The conventional lens-attached light-emitting elements are a set of light-emitting elements, lenses, and parts, and these zero-costs are also required. Further, in the case of a normal lens shape, the radiation intensity and the blade are not necessarily efficient. In order to solve this kind of problem, one has been proposed (Reference 4, 丨禋 use the lighting system of the pilot (McCook Patent Document 1). In this type of lens, # _ 4 „ ..., 糸 中In the case of using the above-mentioned attached mirror, it is judged that the light guide battalion has a good political rate, and the position of the pilot and the component or the light control (4) (4) solves the aforementioned problems. [Patent Document 1] Japanese Patent Application Laid-Open No. Hei. No. Hei. No. 5, No. 5, 583, 【 发明 【 【 【 【 【 【 【 【 【 【 【 【 【 【 ] ] ] ] ] ] ] ] ] ] ] ] ] ] ] ] ] ] ] The light emitted from the light-emitting element is introduced into the light control unit, and the position of the lens or the light guide and the light-emitting elements need not be aligned as described above, and the semiconductor light-emitting element m can be efficiently taken out as light for illumination. A glass-coated light-emitting element, an illumination I, and a projection device are used. [Technical Solution to Problem] The present invention provides a glass-coated light-emitting element comprising: a semiconductor light-emitting element; and glass having Conductor illuminating: a surface on which the light emitted by the member is emitted, the surface of the filament is a spherical shape having a wide spherical surface, and a portion having a spheroidal portion, and the spheroidal portion is attached to the semiconductor illuminating element, and the wavelength of the semiconductor illuminating element is emitted. The refractive index is 1.7 or more, and the ratio of the maximum diameter of the ball-cutting portion to the diameter is at least I; or more; and the slitting portion is a light refraction which is present in the glass without being emitted from the surface of the glass Furthermore, the present invention also provides an illumination device having a glass cover member and a field lens, and a projection device having the illumination device as a light source. [Effect of the Invention] According to the present invention Since the coated glass has the same function as the lens or the light guide, the position does not need to be aligned as described above. That is, when the lens is used to improve the directivity, the semiconductor light must be illuminated 131543.doc. 200903866 The components are individually arranged with the lens but the invention does not require this type 'therefore must be aligned with their position. Aligned and 'in the present invention中, ,) 主.5? T a, ^ ^ ^ ^ 70 pieces are injected into the spherical glassy b, the glass and the external office's Μ χ & interface (hereinafter referred to as "glass interface" ") The incident angle exceeds the critical angle. The semiconductor light-emitting element is totally reflected and returned to the material...~U-face" but due to the scattering of the light-scattering portion, the total reflection condition of the light-path glass interface can be made from glass. Shoot out. Therefore, according to the present invention, the light emitted from the semiconductor light-emitting element can be efficiently taken out as light for light emission, and the increased light amount (the irradiated surface can be illuminated with a desired irradiation pattern). [Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. (First embodiment) Fig. 1 is a cross-sectional view showing the structure of a glass-coated light-emitting element (first light-emitting element) according to a first embodiment of the present invention. The glass-coated light-emitting device 1A includes a semiconductor light-emitting device 丨 and a glass 2, and is disposed on the wiring substrate 3. Further, fine processing of fine concavities and convexities is applied to the bonding surface 2A of the glass-coated light-emitting element 1 and the semiconductor light-emitting element 1 to the bonding surface 2A. This fine processing (light-scattering portion) scatters light that is emitted from the semiconductor light-emitting element 1 and totally reflected by the spherical surface in the glass 2 and returned. This microfabrication is formed by breaking the joint surface 2A of the glass 2 by, for example, sand blasting or etching. The semiconductor light-emitting element (light-emitting element) 1 emits light of a specific wavelength band two-dimensionally from a surface having a light-emitting region (hereinafter referred to as a light-emitting surface), and is mounted on a wiring substrate 3 of 131543.doc 200903866. Here, the structure of the light-emitting element 丨 will be described using Fig. 2 . The light-emitting element 1 has a transparent substrate 14, an n layer 12 formed on the transparent substrate 14, a light-emitting layer 13 formed on the n-layer 12, and a light-emitting layer. The upper layer ρ layer u. to? Electrodes 1Α and 1Β are provided on the layers 11 and 11 12 . The light-emitting element 1 is a so-called flip chip mounting. The electrodes 1A and 1B are connected to the wiring pattern 32 of the wiring board 3 via the bumps 33. In the first embodiment, the light-emitting surface of the light-emitting element 为 is the back surface of the transparent substrate 丨 4 (the surface opposite to the bonding surface 2 玻璃 of the glass 2). The light generated in the light-emitting layer 13 travels in the direction of the arrow 图 of Fig. 2(A) and is emitted through the transparent substrate hopper. The electrode ΙΑ, 1B also functions as a mirror for reflecting light which is not totally reflected on the surface of the glass 2 and is emitted from the surface of the glass 2 to the outside, and returns to the electrodes 1A, ib. In the first embodiment, the light-emitting element i is described by a blue LED, but of course, other colors of led, laser diode or the like may be used. The light-emitting element 1 is generally rectangular or square in view from above. The back surface of the transparent substrate 14 as the light-emitting surface of the light-emitting element 1 may be rectangular or square. Since the light generated from the light-emitting layer 13 is emitted from the light-emitting element 1 via the transparent substrate 14, the back surface of the transparent substrate 14 can be regarded as the light-emitting region of the light-emitting element 1. Then, the light-emitting region is similar to the shape of the electrode (the region shown by the oblique line in Fig. 2(b)). Therefore, in order to obtain the desired projection shape, the electrode shape can be made into a desired projection shape. As will be described later, the glass of the present invention has good directivity. In other words, the incident light can be projected to the outside as it is. In summary, the light-emitting surface of the glass-coated light-emitting element of the present invention can be made to match the light-emitting surface of the projection surface required. 131543.doc 200903866 The shape of the illuminated surface is illuminated to illuminate a variety of shapes. The square or square 1 of the borrowing is typically made of, for example, a light-emitting surface made of a rectangle or a circle, and this 'for the illuminated surface, the light can be illuminated. The application of the illumination source can be expanded. Further, when the shape of the light-emitting element 1 from the top is an elongated shape, the maximum diameter L is the length of the diagonal line, and the glass 2 covers the light-emitting element 1 from 40 Å to 1500 μm. This surface has a spherical half-hearted spherical portion (hereinafter referred to as "spherical glass". Because of this type of shape, the glass-coated light-emitting element of the first embodiment has a light-emitting direction. Both the property and the uniformity. The spherical glass 2 is formed in a shape in which the ball is cut by the joint surface with the light-emitting element 1 (the portion corresponding to the joint surface 2Α in the first embodiment), and the ball is cut. It is called a ball (the ball portion 2C; see Fig. 7(B) and Fig. 8). As the spherical glass 2, for example, it is represented by the mole % of the oxide, and the use is essentially 40 to 53% of Te02, Ge02. 〇~1〇./0, β2〇3 is 5~30%, Ga203 is 〇~10%, Bi2〇3 is 〇~1〇%, Ζη〇 is 3~2〇%, Υ2〇3 is 0~ 3%, La2〇3 is 〇~3%, Gd2〇3 is 〇~7% 'Ta2〇3 is 〇~5% glass. The glass may also be included within the scope of the present invention without damaging the purpose of the present invention. In addition, the content of such a component is preferably 10% or less, and more preferably 5% or less, in which case, for example, "Ge〇2 is 〇~1〇%". Means & 〇2 is not required, but may be up to 10%. The refractive index np of the spherical glass 2 of the light-emitting peak wavelength λρ of the light-emitting element 1 is 1.7 or more. If it is less than 1.7', the maximum illuminance or illuminance distribution described later may become 131543. .doc -10· 200903866

small. And it is 1 · 8 or more, more preferably 1 q丨,; L. And, typically, it is 2.3. Further, λρ is 450 to _ in the blue LED, and in particular, it is generally 450 to 460 (four). Further, the 'light-emitting element i' is not limited to blue: led, and it is possible to use light that emits various wavelengths or bands of a specific wavelength. The diameter of the spherical surface of the spherical glass 2 is set to d, and the diameter of the ball-cutting portion is set to be a machine (the ratio of the intercepting ball; the ratio of the maximum diameter of the ball-cutting portion to the diameter) is at least u or more, preferably 1.8 to 3·5 (otherwise d is equal to the maximum value of the horizontal width of the ball-cutting portion 2C of the spherical glass 2 shown in Fig. 7(B). According to experiments conducted by the inventors of the present invention in advance, the maximum illuminance is preferably 3 × 10 〇 _ 5 or more. The illuminance distribution is preferably 〇.35 or more. The spherical glass of this experiment did not have a light scattering member' but had no effect on the enthalpy results. Specifically, the illuminance of the light-receiving surface is calculated in front of the light source, that is, the light-receiving surface is disposed on the light-emitting side. The emitted light from the light-emitting element is non-coherent in the direction of the full (10) degree of the light-emitting side space, and the refraction and reflection of the exit line are calculated according to the law of refraction and reflection. Moreover, the full intensity of the light source is normalized to mw, and the number of emitted rays is set to be 100,000. In addition, the full intensity of the light source is i mW and the calculation is set for convenience only, and the present invention does not It is limited to this m calculation without considering the polarization reduction caused by the multi-reflection to be 0.0001%. L is set to i mm, the light-receiving surface is set to the square of 15 mm, J mm, 4 mm, that is, d/ L is 1 (the case where the spherical glass is a hemisphere), 2, 3, and the month of the moon. The distance from the light-receiving surface of the spherical surface when the spheroidal glass is formed is calculated. 131543.doc 200903866 Distance setting with the light-receiving surface In the case of the m-square, the light-receiving picture is obtained from the calculation of the Zhaohu & Japanese Knife, Ba Gu/, and β, the maximum illumination (unit: mW) and the knowledge distribution (early position) :%). Show results. (take large illumination) Table 2 (illuminance distribution) Table 2: The degree distribution is read as follows. That is, the lateral length illuminance of the B that is effectively irradiated on the light-receiving surface is obtained as the lateral length b above the maximum illuminance, b/ a is used as the illuminance distribution. The illuminance distribution of na ^ v 叩d - 1 mm is unreadable because the part that is effectively illuminated is more widely affected by light weight. Figure 3 (4) ~ Figure 3 (D), Figure 4 (4) ~ Fig. 4(D) shows the light quantity distribution obtained by the above calculation. According to the curve of the rounded curve in each figure, the d is 1.5 mm and the d is 2 mm, 3 mm, 4 _, which is the machine The illuminance distribution in the case of 2, 3, and * also indicates the auxiliary line for reading the steam. [Table 1] d(mm) np=1.5 ηρ=1.75 Πρ-Ζ.Ο ηρ=2.25 1 1.7χ10' 5 1.4χ10'5 1.3 χΐ〇'5 Ι.ΙχΙΟ'5 2 9.9xl0'5 7·1χ1〇-5 "ίΐχίο^^ 4.5 χ10'5 3 1.5χ10'4 1.9x10-4 1.3 χΤ〇^ Ι. ΙχΙΟ'4 4 1.6xl0'4 3.9Χ10'4 2.9x1 〇'4 2.2χ10'4 131543.doc 12- 200903866 [Table 2]

d(mm) np=1.5 =1.75 2 3 0.29 0.34 0.34 0.54 0.48 0.31 The maximum illuminance is preferably 3<l〇-5 as described previously when 'np is less than 17 7n np=2.〇----- - np=2.25 — 0.68 --- 0.50 0.71 0.77 0.62 ----- 0.70 , the illuminance distribution should be 〇·35 or more. Also, the maximum illumination or illumination distribution is small. When d/L is less than 1·8, the maximum illuminance or illuminance distribution is small. If it exceeds 5, the maximum illuminance or illuminance distribution may become small. It should be 2〇~3 2. The spherical glass 2 covers not only the upper surface of the light-emitting element but also the side surface (the side surface of the transparent substrate 14, the ruthenium layer 12, and the light-emitting layer 13). By covering the side surface of the light-emitting element with the spherical glass 2, light leaking from the side surface of the light-emitting element 1 to the outside can be emitted in a desired direction (direction of arrow A in Fig. 2(A)), and the utilization efficiency of the emitted light can be improved. . Further, the spherical glass 2 can of course be coated on the side faces of the electrodes 1 A, 1 b of the semiconductor light-emitting element 1.

As shown in FIG. 1, the wiring board 3 includes a substrate 3A made of, for example, aluminum or the like, and a wiring pattern 32 attached to the substrate 3, and an Au wiring formed by using a paste. Or formed by Ag wiring, copper foil, or the like. As shown in Fig. 1, the electrodes 1A and 1b of the glass-coated light-emitting device are electrically connected to the wiring pattern 3 2 of the wiring board 3 via bumps 3 such as gold. In Fig. 1, although the spherical glass 2 is not in contact with the wiring board 3, it is of course possible to come into contact with the wiring board 3. As shown in Fig. 5(A), an optical element (integral lens or the like) which is uniform in the absence of the light amount distribution in the light-emitting element 131543.doc 13 200903866 200' which is a non-directional light such as a normal LED is parallel to the collimator 201. The light intensity of the beam of light is the normal distribution (Gaussian cloth) with the largest distribution at the center according to the cosine fourth law (cos4ez) (refer to the data of d=l 〇2 mm in Fig. 6). The θζ system is at an angle with the optical axis of the light incident on the collimator 20 1 Vj, and the Ιζ is emitted from a certain point of the light source, and passes through the lens to reach the intensity distribution of the total light in the illuminated surface, and the 从 is from the light source. The intensity distribution of all rays that are emitted at all points and reaches the illuminated surface. On the other hand, in the present invention, as shown in Fig. 3, the light-emitting element 10 is formed by a glass-coated light-emitting element 10 covered with a spherical glass 2 as a bonding surface of the light-scattering portion. . Therefore, even if a normal LED having a non-directional light emission characteristic as in the related art, that is, a normal LED having a normal distribution light emission characteristic is used as the light-emitting element, the collimator 2〇1 becomes the light intensity I of the beam of the parallel light. The light amount distribution is roughly averaged (refer to the data of Barechip '(4).55 _, d=〇.72 coffee) in Fig. 6. In the case of a directional light source, even if it passes through the spherical glass 2, it will be converted into a directional light beam after passing through the spherical glass 2, so that it passes through the collimator 2〇1. The angle difference between the light and the Geng Mo Love Wo is smaller. 'Because only the four injection directions are collimated, 20 〗 〖Eight m, one part of the meter is 201, so the θζ will be reduced due to the cosine 4th name. Become smaller. —m ύ ύ ( ( 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 关于 返回 关于 返回 关于The blue light of λ Ρ light, for example, 460 131543.doc -14- 200903866 is surface-emitting in a region of approximately 360 degrees of the entire circumference of the light-emitting side space except for the light-emitting element 1 . The illumination pattern immediately after the shot (when the spherical glass 1 is incident) is expressed as a line of ^α~Ί.〇2 mm, which corresponds to the center of the normal distribution and is the largest and <mountain shape. The light emitted from the light-emitting element 1 is emitted after the light is emitted, and immediately travels inside the spherical glass 2 in the air of the tooth, and then penetrates the spherical glass: only the interface with the air is completely Light incident below the reflection angle (critical angle) is emitted to the outside of the spherical glass 2. On the other hand, the light incident on the interface of the disk at the total reflection angle is totally reflected = the return surface 2A. The light returning to the joint surface 2A is scattered by the joint surface 2A of the spherical glass 2 of the light-scattering portion, and thereafter the optical path is changed. Then, the light reaches the glass-air interface at an angle of incidence below the total reflection angle, and is emitted to the outside. (b) About the illuminating point of the imaginary last point when the illuminating point A of the illuminating element 1 as the light source is the true spherical condition: side: away, penetrating the spherical glass At 2 o'clock, it will expand in the direction in which the beam penetrates the spherical glass 2: For example, as shown in Fig. 7(A), the spherical glass 2 without the intercepting portion is spherical. The near-axis of the aberration ^ The killing is established, and the light-emitting point of the right light-emitting element is located at the rear point A of the spherical glass 21, and then the spherical glass 2 is emitted, and the rear beam is slammed in parallel. In addition, in fact, since 4 is emitted from the light-emitting point A and the ball-shaped glass 2 is emitted, the ballast line is emitted from the spherical glass 2丨, and the spherical aberration becomes the same as the optical axis. The bigger, so the light travels compared to the absence of aberrations, who is too A Α 丨 ° ° will be close to the direction of the optical axis. Further, 131543.doc 200903866 On the one hand, the light-emitting element 2 of the present invention is as shown in Fig. 8 (8), since the light-emitting point A is the highest than the spherical glass 2

±丄+丄, ..., the front side (Z-axis direction) of the shot direction is deviated, so it is possible to give the light (hereinafter referred to as the first effect). ', the effect of expanding in the direction of the direction (C), when the spherical glass 2 is penetrated, by setting the refractive index to, for example, 1.7 or more, the light beam can be expanded in the diffusion direction, or by setting n as, for example. 2.2 or less, the beam can be narrowed in the convergence direction: Generally, in the section including the optical axis passing through the center of the double-sided ball lens, if the lens surface radius is set to η, Γ 2', the refractive index of the spherical lens is set to η 'The lens thickness in the direction of the optical axis is &, and the refractive power (i/f; point distance) is expressed by the formula (1). Is ',,, 1 /f-[(n-1 )/γ] ] + [( 1 _n)/r2j ...(1) + [{(nl)2d}/(n · r, · r2)] for a spherical lens , ri=-r2=d/2. Regarding the shape in which the spherical glass 2 cuts out a part of the ball in a plane, that is, the shape of the cut ball, if one part of the ball is cut by the radius of the hemisphere on the side, this is set to r for convenience, and then Γ| becomes 1, 1 / Γ | - 〇 ' Therefore, the formula (1) becomes the following formula (2). R2=(ln).f (2) Then, in the ideal case of fully satisfying the paraxial condition, when η is 2, it becomes Γ2^, that is, the focal length is equal to i*2, and is placed from the center of the lens at the position of r2. In the case of an object point, the emitted light becomes parallel light. Therefore, in such an ideal case, if the refractive index of the spherical glass 2 is less than 2, the light beam will diffuse. If it exceeds 2, the light beam will converge, which can give the effect of beam convergence of 131543.doc -16-200903866 ( Hereinafter referred to as the second effect). (d) Regarding the spherical aberration of the spherical glass 2, when the spherical glass 2 is penetrated, the effect of the convergence direction (the adjustment) of the effects of the above (B) and (C) occurs: Except for the ideal case of paraxial conditions, the light traveling parallel from the object point on the optical axis (Z) as shown in Fig. 8 is generally perpendicular to the direction (X) of the optical axis (Z). The light whose optical axis (z) is far away from the object point, the more the imaging effect (spherical aberration) occurs closer than the ideal focus position. Therefore, the present invention sets the d/L of the spherical glass 2 and the refractive index Πρ to an appropriate value in order to cancel the combined value of the first and second effects by this action. That is, the present invention is set as follows in order to achieve this: a) the light-emitting point 8 of the light-emitting element 1 is deviated from the front side of the spherical glass 2 toward the front side of the irradiation direction; and b) as a spherical glass The 2 series uses np to be 丨7 or more, and more preferably 1·8 to 2_2, and typically 1 to 9 2 is used. Therefore, according to this embodiment, as shown in FIG. 9(A), the semiconductor is used.

The light of the field. Then, if it is emitted, it returns to the region where the semiconductor light-emitting element 1 is present. According to this embodiment, a light-scattering portion is provided. According to 131543.doc 200903866, if light returning to the vicinity of the light-emitting element 由于 due to total reflection enters the joint surface 2A (refer to FIG. 作为) as the light-scattering portion, the light path changes due to the refracting there. Therefore, the total reflection condition of the refraction return light at the glass interface is broken, and the incident angle of the incident light at the interface of the spherical glass 2 is covered within the critical angle δ, thereby passing the thick line arrow like the figure (B). The light path shown by b is emitted from the spherical glass 2. As a result, according to the glass-coated light-emitting element of the first embodiment, light that has not been emitted to the outside of the glass due to total reflection can be emitted to the outside of the glass, so that the amount of light can be increased. Thereby, a high-intensity parallel light source that replaces a conventional lamp light source or the like can be realized, and the shape of the irradiation surface can be freely set to a desired shape. (Different embodiment) Next, the second embodiment of the present invention will be described. In the present embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals and the description thereof will not be repeated. 1 shows a glass-coated light-emitting element (second light-emitting element) 20 according to a second embodiment of the present invention; and the glass-coated light-emitting element 2 〇' is used for emitting from the semiconductor light-emitting element 1 The light scattering portion that is totally reflected by the spherical surface in the spherical glass 2 and returned by the light scattering is replaced by the fine surface of the bonding surface 2A by fine concavities and convexities between the spherical glass 2 and the semiconductor light emitting element 1. a space 2B in which a plurality of fine beads composed of aluminum are interposed as a filler 4 of a light-scattering member, and in a state in which the fillers 4 are interposed, the spherical glass 2 is integrally joined with a UV adhesive. Semiconductor light-emitting element 1. Here, the particle size of the filler is preferably from 1 〇〇 0 claw to 131543.doc -18- 200903866 200 nm. If the system is too small, the scattering ability will decrease, and if it is too large, the scattering power per unit volume will decrease. However, the particle diameter is not particularly limited. Therefore, the light from the semiconductor light-emitting element 1 in the present embodiment also enters the inside of the spherical glass 2, and returns to the vicinity of the light-emitting surface of the semiconductor light-emitting element due to total reflection. Then, if the return light happens to be incident on a plurality of fine bead-like fillers 4 as light scattering portions, the optical path changes due to scattering there. Therefore, the total reflection condition of the refracted return light at the glass interface is broken, and the incident angle of the incident light at the interface of the spherical glass 2 covers the critical angle δ and is emitted from the spherical glass 2. As a result, according to the glass-coated light-emitting element of the second embodiment, light that has not been emitted to the outside of the glass due to total reflection can be emitted to the outside of the glass, so that the amount of light can be increased. According to the second embodiment, if the glass-coated light-emitting element according to the second embodiment is interposed between the spherical glass 2 and the +-conductor light-emitting element 1 by the light-scattering portion, not only the total reflection of the spherical glass is eliminated. The amount of light is increased or the effect of light extraction is improved, and the scattering of the scattering layer can be changed by using the grain t of the filler, the refractive index, and the filling rate as parameters. Health. Therefore, the glass-coated illuminating element ' according to the third embodiment of the right has an effect of making the emission luminance distribution more uniform or optimized. (Third embodiment) Next, a third embodiment of the present invention will be described. In addition, in this embodiment, the same reference numerals are attached to the same parts as those of the first, and the first part, and the repeated explanation is avoided. Fig. 11 is a view showing a glass-coated 131543.doc -19·200903866 light-emitting element (second light-emitting element) 30A according to a third embodiment of the present invention; and the glass-coated light-emitting element 3A for use as a glass-coated light-emitting element 3A Instead of the interface surface 2A, a light-scattering portion composed of fine irregularities is applied to the light-scattering portion that is emitted from the semiconductor light-emitting device i and totally reflected by the surface in the spherical glass 2 and is returned to the semiconductor surface. As the electrode of the optical element 1, mirror electrodes 丨c and 丨D having a microfabricated reflecting surface (having a light reflecting function) are used. Here, the mirror electrode 1D uses Μ,

Metals such as Au, Pd, and Rh that have good hole injectability and good reflectance are used as the P electrode. The galvanic mirror electrodes 1C and 1D are formed of a material having high reflectivity, and are subjected to fine processing of irregularities on the joint surface side with the P layer or the η layer, that is, the joint surface (upper surface) close to the light-emitting surface. Therefore, in the present embodiment, the inside of the spherical glass 2 is caused to return to the return light of the semiconductor light-emitting element 1 due to total reflection, and the mirror electrodes 1C and 1D are also disposed on the mirror electrodes 1C and 1D. Since the uneven portion of the microfabrication is scattered and reflected, the optical path is changed and returned to the spherical glass 2, and as a result, according to the glass-coated illuminating element of the third embodiment, it is possible to The emitted light is emitted to the outside of the glass, so that it has an effect of increasing the amount of light. Further, according to the glass-coated light-emitting device of the third embodiment, since the mirror electrode is used as an electrode, a new component is not required, and the effect of cost reduction can be achieved. Further, 'in the case of the glass-coated light-emitting element 3B of the type shown in the same figure (B) as the glass-coated light-emitting element 3A of the present embodiment, the 'electrode is not provided in the semiconductor light-emitting element 1 It is set on two sides on one side. 131543.doc •20- 200903866 The electrodes IE and IF are located in the expensive $ politics, and the 'negative electrode' of the spherical glass 2 emitted by the sin near the emitted light is composed of transparent β. . On the other hand, the (positive) electrode 1 on the opposite side is composed of the mirror electrode broadcast potential, and is subjected to microfabrication of the unevenness on the surface (upper surface) adjacent to the tantalum layer. Further, (4) the electric (four) is connected to the wiring pattern 32 of the wiring board 3 by metal wire bonding using the gold wire 34, and is connected to the semiconductor light-emitting element 1 u U 丨 κ κ 面The gold wire 34 is sealed with the entire sealing portion 5. (Fourth embodiment) Next, a fourth embodiment of the present invention will be described. In the present embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals and the description thereof will not be repeated. Fig. 12 is a view showing a glass-coated light-emitting device (fourth light-emitting device) 40 according to a fourth embodiment of the present invention; and the glass-coated light-emitting device 40' is mounted on a transparent substrate 14 The surface mount type semiconductor wafer is configured 'and the electrode portion of the semiconductor light emitting element 1 is composed of transparent electrodes 1G and 1Η. Then, between the transparent electrodes 1G and 1B of the semiconductor light-emitting element 1 and the wiring pattern 32 of the wiring board 3, the gold wires 34 and the like are connected by metal wire bonding. Further, in the glass-coated light-emitting device 40 of the present embodiment, a sealing portion 5 which is sealed with a transparent resin is provided on the light-emitting surface of the semiconductor light-emitting element 1. Further, the light-shielded light-emitting element 40 is formed as a light-scattering portion 'at least on the upper surface of the wiring substrate 3 directly below the light-emitting region corresponding to the light-emitting region of the semiconductor light-emitting element 1 so as to penetrate the semiconductor light-emitting element 1 The reflective surface 31Α reflected by the incident light. Further, the reflecting surface 131543.doc -21 - 200903866 31A is subjected to fine concavo-convex processing to constitute a scattering reflecting surface. Therefore, in the present embodiment, the return light that has traveled inside the spherical glass 2 and returned to the semiconductor light emitting element 由于 due to total reflection, the semiconductor light emitting element 1 and the wiring substrate 3 are also disposed in the return light. The reflecting surface 31 of the uneven portion on the upper surface of the wiring board 3 is scatter-reflected. As a result, among the lights returning to the inside of the spherical glass 2, the return light of the incident angle of the glass interface of the spherical glass 2 below the critical angle is emitted from the spherical glass 2 among the light which is returned to the inside of the spherical glass 2 and the total reflection condition is broken. As a result, according to the glass-coated light-emitting element of the fourth embodiment, light that has not been emitted to the outside of the glass due to total reflection can be emitted to the outside of the glass, so that the amount of light can be increased. Further, the glass-coated light-emitting element ' according to the fourth embodiment has an effect that it can also be applied to a surface mount type semiconductor light-emitting element. Further, in combination with the fourth embodiment and the second embodiment, the structure in which the seal portion 5 of the seal gold wire 34 has a light-scattering property does not pose a problem. Next, using the glass-coated light-emitting element of the present invention, the illuminance distribution from a place far away from the distance is simulated. Further, in the simulation, the glass-coated light-emitting element 第一 of the first embodiment is used as a glass-coated light-emitting element. In the glass-coated light-emitting device 10', as shown in Figs. 13(A) and (B), the LED light source of one side of the light-emitting element 1 is 0.32 mm □ (where ' □ means square, the same applies hereinafter) The ball glass 2 has a refractive index of 2.0 (when λ = 546 nm). Moreover, as shown in Fig. (C), on the front side of the light-emitting element 1 which is only 50 mm away, a photodetector D of one side of 100 mm is set, and the simulation is performed by the simulation] 31543.di -22- 200903866 degrees Distribution. Further, a reflecting plate R is provided on the back surface of the light-emitting element 丨. According to the simulation, the scattering rate is 〇% (in this case, 1%% positive reflection), 10% (the remaining 90% is regular reflection. The same applies below), 30〇/〇, 50%, 60%. , 70%, 90°/. , 99°/. The optical characteristics of the time are obtained as shown in Fig. 14 to Fig. 21, respectively, and the luminance distribution shown in Fig. 148 to Fig. 213 and the plane (irradiated surface) are shown in Fig. 4 A to Fig. 2丨a illumination score

Fig. 14C to Fig. 21C of the plane illuminance distribution of the cloth. Moreover, Figure 1 4D ~ Figure 21D

The contour maps of FIGS. 14C to 21C are schematically shown. Further, for comparison, Fig. 22 also shows respective graphs in the case where the absorption of the reflecting plate is 1%. Low stone

A “i ϋ 固 固 上 上 L L 圚 1 2 1 L can be understood between the scattering rate (scattering ratio) and the distribution of illuminance, there is a specific correlation. For example, Figure 14 ~ Figure 17, in the case of small scattering rate, the table In the central portion of the irradiation region, the illuminance is small, and the outer edge portion of 9 is enlarged. On the other hand, as shown in Fig. 2 and Fig. 21, when the scattering ratio is large, the illuminance at the central portion in the irradiation region is large, and the outer edge portion is large. Then, as shown in Fig. 18Α, Fig. 18C, Fig. 19, and Fig. (4), when the ratio = 4 (large (four)% to 7〇%), the shape is similar to that of the light-emitting element (having a square or a long length). In the square ^ ..., in the area of the shot, the illuminance is: The edge 4 is approximately equal to the inside of the plane, and the illuminance is ±, ,, and so, and it can be understood that by adjusting the emissivity, the shot can be made in the area of illumination.玫— ', ' and sentence -. Regardless of the regulation of the illuminating element, the change of her type, ^ J" into the 仃垓 class control. And, according to the simulation, it can be seen that the scatter has, for example, the 匕 rate With the illuminance (the total beam amount 啕 such as the correlation of Figure 23, the political rate exceeds a certain ratio will be J31543.doc -23· 200 903866 (in the case of the evaluation of a scattering rate of about 20%), the illuminance of a specific value or more can be obtained stably. Next, the illuminating device according to the present invention will be described with reference to Fig. 24. The illuminating device 50 of the present invention is provided with the present invention. The glass-coated light-emitting element 10 and the field lens (objective lens) disposed in front of the glass-coated light-emitting element 1 are usually electrically connected to the wiring pattern of the wiring substrate by bumps. According to the illuminating device 50 of the present invention, the chief ray of each of the light rays of the glass-coated light-emitting element 1 is emitted to the position of the light-emitting point along the led and the center point of the glass-coated light-emitting element 10. The z-direction travels as a beam of uniform directivity and reaches the field lens 60. Then, the beams reaching the field lens 60 are further at the height of the arrival point of the field lens 60, by which it is refracted. The force is biased toward the direction of the optical axis of the lens in parallel and reaches the object to be illuminated (not shown). Here, the spherical lens and the field lens 20 which are light-coated by the glass are ideal. Without the aberration lens, the omnidirectional light can also be incident perpendicularly on the object to be illuminated, but since virtually any lens has a large spherical aberration, it is inevitable that there is a certain degree of oblique injection into the body. Light of the illuminating body. However, by observing the state of deviation of the spheroidal lens from the light of the field lens 6 ,, the refractive power and position of the field lens 60 are optimized as shown in FIG. The light beam in the vicinity of the center and the periphery is incident on the surface of the illuminated body, so that most of the light emitted from the glass-coated light-emitting element 1 can be incident as close as possible to the vertical within the range of the aberration. Illuminated decently by 131543.doc -24- 200903866. Further, 'as a mechanism for making the passing beam as parallel as possible, instead of a low-cost plano-convex lens, the field lens is made into an aspherical lens having an optimum aspherical shape (flat convex or double-sided), It can also be more straight. In this case, whether or not the aspherical lens is used in comparison with the effect of uniformization of illumination light and brightness enhancement can be considered. Then, 'the position of the light incident on the illuminated body corresponds to the position of the light-emitting point of the glass-coated light-emitting element 1 ,, so if the light intensity of the light-emitting element 10 covered by the glass is the same, the illumination is reached. The light intensity at each point of the body also becomes nearly the same state. Therefore, for example, in the category of a general architectural lighting member, a display such as a liquid crystal television or a projection screen, an expensive additional optical system, such as a homogenous optical system of a conventional integrator lens system, is not required. In the case of adding a low-cost uniformity element such as a thin diffusion plate, an illumination surface or a screen having substantially uniform light intensity can be realized. Further, in the present invention, since the light-shielding member 10 coated with the glass is provided with the light-scattering portion, the inside of the illumination region can be illuminated with substantially the same illuminance as the outer edge portion, and the light-emitting region of the light-emitting element has Since the shape corresponds to the shape of the light-emitting element i, the light-emitting element 1 can be formed into a fitting, and the shape of the bright body can be freely formed in the illumination region of the object to be illuminated. Next, a projection apparatus (hereinafter simply referred to as a projector) according to the present invention will be described with reference to Fig. 25, but the present invention is not limited to the one shown in the figure. The projector of the invention! 00 is provided with: glass-coated light of the present invention 131543.doc -25, 200903866 elements 10R, 10G, 10B, field lens 60, LCD (liquid crystal display device) 70R, 70G, 70B and multiplexer 80 and projection lens 90 . Further, the glass-coated light-emitting elements 10R, 10G, and 10B are generally electrically connected to the wiring pattern of the wiring substrate by bumps. The illumination devices 50R, 50G, and 50B are configured by the glass-coated light-emitting elements 10R, 10G, and 10B and the respective LCDs 70R, 70G, and 70B. According to the projector 100 configured as above, the light from the glass-coated light-emitting elements 10R, 丨0G, and 10B provided as the respective light sources of RGB penetrates the field lens 60 and enters the LCD from the back side. (Liquid crystal display device) 70R, 70G' 70B constitutes a backlight. Then, after the LCD (liquid crystal display device) 70R, 70G, and 70B forms an image corresponding to each light component of RGB, the image components are combined by the multiplexer element 8 and then incident on the projection lens. 90. According to the projector 100 of the present invention, the LCDs of the three primary colors are configured by the structures of the light-emitting elements 1 OR, 10G, 10B and one field lens 6〇, and the integrated optical system having a complicated volume and a certain volume is not used. The uniform optical system 'is configured to uniformly illuminate the optical engine portion inside the illumination region with substantially the same illumination as the outer edge portion. Therefore, the conventional three-piece LCD can be used, and the τν optical system can be produced in a small size and at a low cost by drastically reducing the number of parts. Already. The present invention will be described with reference to the specific embodiments, and it is understood that the invention may be modified or modified without departing from the spirit and scope of the invention. This application is based on a Japanese patent application filed on May 27, 2007. (Japanese Patent No. 7 1321 94), which is incorporated herein by reference. 131543.doc -26- 200903866 [Industrial availability]. The glass-coated I of the present invention has a good illumination effect, and can efficiently emit light in a desired direction, and has no need to be aligned with the position of the lens or the light guide. In addition, since the light emitted from the semiconductor light-emitting element can be efficiently taken out by the light-scattering portion and used as light for light, an image field lens is disposed on the light-emitting element of the glass-coated light-emitting element ( An illumination source of an objective lens or a projection device having the illumination source is useful. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a conceptual view showing a cross section of a light-emitting element and a wiring board of a glass-coated light-emitting element according to a first embodiment of the present invention. Fig. 2(A) is an enlarged conceptual view showing the surface of the light-emitting element and the wiring board of the light-shielded light-emitting element, and Fig. 2(B) is a schematic plan view showing the shape of the electrode or the like of the light-emitting element. 3(A) to 3(D) are diagrams showing the calculation results (light amount distribution) in the case where the refractive index of the spherical glass is 5 . 4(A) to 4(D) are explanatory views showing the calculation result (light amount distribution) in the case where the refractive index of the spherical glass is 2 〇. Fig. 5(A) is a graph showing the light distribution of the light path and the irradiation surface of the light-emitting element from the non-directional light-emitting element to the irradiation surface, and (B) showing the light-emitting element coated with the glass of the present invention to the irradiation surface. A graph of the light distribution of the illumination path and the illumination surface. The figure shows the angle dependence of the light emitted from the glass-coated light-emitting element of the present invention. 131543.doc -27- 200903866 Figure 7(A) is an explanatory diagram showing the optical path of the ball lens after the light-emitting point a of the light-emitting element is the last point of the ball lens, and (8) shows that the light-emitting point A is larger than the ball lens. An explanatory diagram of the optical path when the last square point deviates to the side before the irradiation direction. Fig. 8 is an explanatory view showing the optical path shift caused by the spherical aberration of the glass-coated light-emitting element of the present invention. Fig. 9(A) is an explanatory view showing a total internal reflection region of the glass-coated light-emitting device of the present invention, and Fig. 9(B) is an optical path diagram showing the optical path of the illumination light when emitted from the inside of the glass. Fig. 10 is a conceptual view showing a cross section of a glass-coated light-emitting element according to a second embodiment of the present invention. Fig. 11 (A) and (B) are conceptual views showing a cross section of a glass-coated light-emitting device according to a third embodiment of the present invention, and a modification thereof. Η 12 is a conceptual diagram of a cross section of a glass-coated light-emitting element of a fourth embodiment of the present invention. Fig. 13 is a schematic view showing setting conditions for the simulation of the investigation of the illuminance distribution by the glass-coated light-emitting element of the present invention. Fig. 14 is a graph showing the illuminance distribution when the scattering rate of the reflecting plate is not set to 〇% (in this case, 100% regular reflection) and the simulation is performed. Fig. 14 is a graph showing the luminance distribution when the scattering rate of the reflecting plate is set to (in this case, 100% regular reflection) and the simulation is performed. Fig. 14C is a graph showing the in-plane illuminance distribution when the scattering rate of the reflecting plate is set to 〇% (in this case, 100% regular reflection) and the simulation is performed. Fig. 14D schematically shows a contour map of Fig. 14c. 131543.doc -28- 200903866 Fig. 15A is a graph showing the illuminance distribution when the scattering rate of the reflecting plate is set to 1% and the simulation is performed. Fig. 15B is a graph showing the luminance distribution when the scattering rate of the reflecting plate is set to 1% and simulated. Fig. 15C is a graph showing the in-plane illuminance distribution when the scattering rate of the reflecting plate is set to 1% and simulated. Fig. 15D schematically shows a contour map of Fig. 15c. Fig. 16A is a graph showing the illuminance distribution when the scattering rate of the reflecting plate is set to 3〇% and simulated. Fig. 16B is a graph showing the luminance distribution when the scattering rate of the reflecting plate is set to 3〇% and the simulation is performed. Fig. 16C is a graph showing the in-plane illuminance distribution when the scattering rate of the reflecting plate is set to 3〇% and simulated. Fig. 16D schematically shows a contour map of Fig. 16c. Fig. 17A is a graph showing the illuminance distribution when the scattering rate of the reflecting plate is not set to 5 % and the simulation is performed. Fig. 17B is a graph showing the luminance distribution when the scattering rate of the reflecting plate is set to 5〇% and the simulation is performed. Fig. 1 7C shows that the scattering rate of the reflecting plate is set to 5 〇 Q / . And a graph of the illuminance distribution in the plane when the simulation is performed. Fig. 17D schematically shows a contour map of Fig. 1C. Fig. 1 8 is a graph showing the illuminance distribution when the scattering rate of the reflecting plate is set to 6〇% and the simulation is performed. Fig. 1B shows that the scattering rate of the reflecting plate is set to 6 〇 Q / . And a graph of the brightness distribution at the time of simulation 131543.doc •29· 200903866. Fig. 1 is a graph showing the in-plane illuminance distribution when the scattering rate of the reflecting plate is set to 60% and simulated. Fig. 1 8D schematically shows a contour map of Fig. 18C. Fig. 19A is a graph showing the illuminance distribution when the scattering rate of the reflecting plate is set to 70% and the simulation is performed. Fig. 1 9B is a graph showing the luminance distribution when the scattering rate of the reflecting plate is set to 70% and the simulation is performed. " Fig. 1 9C is a graph showing the in-plane illuminance distribution when the scattering rate of the reflecting plate is set to 70% and the simulation is performed. Fig. 19D schematically shows a contour map of Fig. 19C. Fig. 20A is a graph showing the illuminance distribution when the scattering rate of the reflecting plate is set to 90% and simulated. Fig. 20B is a graph showing the luminance distribution when the scattering rate of the reflecting plate is set to 90% and simulated. Fig. 20C is a graph showing the in-plane illuminance distribution when the scattering rate of the reflecting plate is set to 90% and the simulation i is performed. Fig. 20D schematically shows a contour map of Fig. 20C. Fig. 21A is a graph showing the illuminance distribution when the scattering rate of the reflecting plate is set to 99% and simulated. Fig. 21B is a graph showing the luminance distribution when the scattering rate of the reflecting plate is set to 99% and simulated. Fig. 2 1C is a graph showing the in-plane illuminance distribution when the scattering rate of the reflecting plate is set to 99% and simulated. 131543.doc -30- 200903866 Fig. 21D schematically shows a contour map of Fig. 21C. Fig. 2 2 A shows a graph showing the illuminance distribution when the absorptivity of the reflecting plate is set to 丨〇 〇 % and the simulation is performed. Fig. 22B is a graph showing the luminance distribution when the absorptivity of the reflecting plate is set to 1% and the simulation is performed. Fig. 22C is a graph showing the in-plane illuminance distribution when the absorptivity of the reflecting plate is set to 1% and simulated. Fig. 22D schematically shows a contour map of Fig. 22c. Fig. 23 is a graph showing the relationship between the scattering rate of the reflecting plate and the total % beam amount. Fig. 24 (A) and (B) are a structural view and a front view showing a lighting device of the present invention. Figure 25 is a view showing the configuration of a projection apparatus of the present invention. [Description of main component symbols] 1 Semiconductor light-emitting device (light-emitting device) ΙΑ, 1B electrode 1C, ID, 1E mirror electrode IF, 1G, 1H transparent electrode 2 spherical glass (glass) 2A joint surface 3 wiring substrate 4 filler 5 Sealing part 10, 20, 30A, glass-coated light-emitting element V, 131543.doc -31 - 200903866 30B, 40 10R, 10G, 10B Glass-coated light-emitting device 14 Transparent substrate 31 Substrate 3 反射 Reflecting surface (scattering reflection Surface) 32 Wiring pattern 33 Bump 50 Illumination device 60 Field lens (objective lens) 70R, 70G, 70B LCD (liquid crystal display device) 80 Combining element 90 Projection lens 100 Projector 131543.doc -32-

Claims (1)

200903866 X. Patent Application Scope 1· A glass-coated light-emitting element comprising a semiconductor light-emitting element; glass having a surface from the surface of the semiconductor light-emitting element, the surface being wider than a hemispherical sphere, "Importing the intercepting portion, and the portion of the body at the cutting portion has a fold of the peak wavelength of the semiconductor light-emitting element: = or more, and the maximum diameter of the ball-cut portion is relatively greater than or equal to 7; And Wang Hao is light scattering 4 which is a light refracting element which is not emitted from the aforementioned surface of the glass in the inside of the glass. 2. The glass-coated light-emitting element of claim ,, wherein the light scattering portion is not described And a concave-convex surface formed by coating the surface of the light-emitting surface of the semiconductor light-emitting device with the glass. 3. The glass-coated light-emitting element of claim 1, wherein the light-scattering portion is formed of a green light-emitting member. (4) The scattering member is provided between the surface of the glass covering the light emitting surface of the semiconductor light emitting element and the light emitting surface of the semiconductor light emitting element. The glass-coated light-emitting device, wherein the light-scattering portion is formed on the glass-shielded light-emitting element of the semiconductor light-emitting device, wherein the light-scattering portion is The light-reflecting surface of the glass-coated light-emitting element according to any one of claims 1 to 5, wherein the refractive index of the music is 2.3 or less. 7. The glass-coated light-emitting element according to any one of items 1 to 6, wherein the refractive index is 1.8 to 2 2, and the ratio is 35 or less. The glass-coated light-emitting element according to any one of the preceding claims, wherein the semiconductor light-emitting element is a light-emitting diode, wherein the glass-coated light-emitting element according to any one of claims 1 to 8, wherein A projection apparatus comprising a glass of illumination as claimed in claim 1 as a light 131543.doc