JP2008041626A - Color conversion board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable handling as one component, and enable to classify beforehand for every desired color conversion light by a combination with a light source. <P>SOLUTION: The color conversion board 1B includes a pair of transparent boards 2A, 2B arranged in opposition and a spacer member 3 of a frame shape fixed between the pair of transparent boards 2A, 2B to form a space part 4 sealed in a uniform thickness and having a through-hole 5 communicating to the space part 4. Silicon gel 7 dispersed and mixed with a phosphor 6 is sealed in the space part 4 from the through-hole 5, and the through-hole 5 is sealed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a color conversion plate that is disposed on a semiconductor light emitting element (hereinafter referred to as an LED) as a light source, converts light from the LED into a desired color, and emits the light.

  The LED as a light source is attracting attention as a next-generation lighting because it does not consume extra heat and has an overwhelmingly long life compared to display bulbs and fluorescent lamps. For example, mobile phones and digital video cameras, Widely used for display of electronic devices such as backlights of electronic devices such as PDAs, large displays and road indicators.

  By the way, various light source devices using a color conversion material for converting the light from this type of LED into a desired color and emitting it have been proposed. FIG. 9 is a cross-sectional view of a light source device disclosed in Patent Document 1 below as an example of a light source device using this type of color conversion material.

As shown in FIG. 9, a light source device 51 disclosed in Patent Document 1 is obtained by attaching a lamp house 55 on a printed board 54 in which a circuit conductor 53 is formed on a board 52 made of an insulating base material. The lamp house 55 is provided with a cup 56 having a reflective surface, and a blue LED chip 58 that emits blue light is fixed to a bottom surface 57 of the cup 56. The electrodes formed on the LED chip 58 and the circuit conductor 53 formed on the printed circuit board 54 are individually connected by bonding wires 59. The cup 56 of the lamp house 55 is filled with a silicone resin 61 in which a color conversion material 60 is dispersed.
Japanese Patent Laid-Open No. 2005-229048

  By the way, conventionally, when a light source device is configured by using a plurality of LEDs having the same emission color, color unevenness occurs if the LEDs do not emit light evenly. Therefore, the LEDs are preliminarily set according to the degree of color variation for each emission color. The operation | work which classify | categorizes for every group was performed, and LED of the same group was mounted in the light source device.

  When the light source device is configured using the color conversion material 60 as in the light source device 51 of FIG. 9, in addition to the above-described prior LED classification, the amount of phosphor mixed in the resin to be filled is adjusted. I was going.

  However, in the light source device using this type of color conversion material, the color of the color conversion light is determined by the combination of the light emission color of the LED and the color conversion material. Color variation also occurs in the color-converted light that is finally emitted depending on the thickness of the resin and how the color conversion material is mixed with the filling resin.

  However, in the conventional light source device including the light source device 51 of FIG. 9, since the resin in which the color conversion material is dispersed and mixed is filled, the thickness of the filling resin including the color conversion material is difficult to be uniform, and the desired color can be obtained. It was difficult to obtain color converted light.

  In addition, the color conversion light varies depending not only on the thickness of the filling resin containing the color conversion material described above but also on how the color conversion material is mixed with the filling resin and the type of the color conversion material. Color conversion light could not be obtained. In addition, in the conventional configuration including the light source device 51 of FIG. 9, the filling resin including the color conversion material cannot be handled as one component. For this reason, in order to obtain uniform color-converted light of a desired color, the light source device as a finished product must be classified, and there is a problem in that there are many useless finished products.

  The present invention has been made to solve the above-described problems, and can be handled as a single component, and can be classified in advance for each desired color-converted light in combination with a light source. The purpose is to provide a conversion plate.

  The color conversion plate according to claim 1 of the present invention is characterized in that a phosphor is dispersed and mixed in silicone rubber or silicone resin to have a uniform thickness.

A color conversion plate according to claim 2 is a pair of transparent plates arranged to face each other,
A frame-shaped spacer member fixed between the pair of transparent plates so as to form a space sealed in an even thickness,
A phosphor is attached to a wall surface through which light in the space is transmitted.

A color conversion plate according to claim 3 is a pair of transparent plates disposed to face each other,
A frame-shaped spacer member that is fixed between the pair of transparent plates so as to form a space portion hermetically sealed to a uniform thickness and has a through hole that leads to the space portion;
Silicone gel in which a phosphor is dispersed and mixed is sealed from the through hole into the space, and the through hole is sealed.

The color conversion board according to claim 4 is the color conversion board according to claim 3,
The spacer member is made of a screen printing layer.

The color conversion board according to claim 5 is the color conversion board according to any one of claims 1 to 4,
A fine convex and / or concave dot portion is formed on the light emitting surface.

  According to the color conversion plate of the present invention, it can be easily handled as one component. Before the light source device is completed, a color conversion plate is temporarily mounted on the light source device and the light source is driven to emit light, thereby subdividing the excitation wavelength and classifying the color conversion plate in advance according to the degree of variation. As a result, it is possible to supply the optimum light source according to the wavelength of the light source and for each application.

  In addition, if a silicone gel containing a phosphor is sealed in a space formed between a pair of transparent plates and a frame-shaped spacer member, even if silicone gel is used, water vapor can be transmitted to the space. In addition, high yield strength and high reliability in a high temperature and high humidity environment can be obtained.

  Furthermore, according to the structure in which the phosphor is attached to the wall surface through which light in the space is transmitted or the silicone gel containing the phosphor is sealed in the space, the space has a pair of transparent plate and frame-shaped spacer member Since the thickness is always maintained at a constant thickness, there is little variation in excitation wavelength.

  If the spacer member is formed of a screen printing layer, it can be produced using an existing established screen printing technique, and mass productivity can be improved.

  If a fine convex or concave dot portion is formed on the light exit surface, the extraction efficiency of the color conversion light can be improved by refraction and reflection at the dot portion.

Hereinafter, the best mode of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a diagram showing a first embodiment of a color conversion plate according to the present invention, FIGS. 2A to 2C are diagrams showing a second embodiment of a color conversion plate according to the present invention, and FIGS. 2 is an explanatory diagram of the manufacturing process of the color conversion plate of FIG. 2, FIG. 4 is a view showing a third embodiment of the color conversion plate according to the present invention, FIG. 5 is a partial sectional view of the color conversion plate of FIG. Is a partial cross-sectional view showing a fourth embodiment of the color conversion plate according to the present invention, FIG. 7 is a partial cross-sectional view showing another configuration example of the color conversion plate according to the present invention, and FIG. 8 shows the color conversion plate according to the present invention. It is a schematic sectional drawing which shows an example of the used light source device.

  First, the color conversion plate 1 (1A) according to the first embodiment will be described with reference to FIG. As shown in FIG. 1, the color conversion plate 1 </ b> A according to the first embodiment is formed by dispersing phosphor 6 in silicone rubber or silicone resin and forming a rectangular (rectangular) flat plate with uniform thickness. The thickness of the color conversion plate 1A is preferably formed to a uniform thickness within a range of 0.3 to 1.5 mm in consideration of color conversion efficiency. The color conversion plate 1A has one surface (back surface) as a light incident surface 1a from a light source (LED 12 described later) and the other surface (front surface) as a light emitting surface 1b that emits color converted light.

  For the phosphor 6 dispersed and mixed in the silicone rubber or the silicone resin, a material capable of obtaining a desired color conversion light is selected by a combination with a light source (LED 12) described later. For example, when a blue light emitting material (InGaN compound) LED is used to obtain white light as color conversion light, an orange fluorescent pigment or an orange fluorescent dye is selected as the phosphor 6.

More specifically, the fluorescent material 6 is preferably an inorganic phosphor, and color-converts (wavelength-converts) the light incident from the LED 12. As a material suitable as the inorganic phosphor constituting the fluorescent material 6, for example, A ₃ B ₅ O ₁₂ : M-based phosphor (A: Y, Gd, Lu, Tb, B: Al, Ga, M: Ce ³⁺ , Tb ³⁺ , Eu ³⁺ , Cr ³⁺ , Nd ³⁺ or Er ³⁺ ), rare earth-doped barium-aluminum-magnesium compound phosphor (BAM phosphor), Y ₂ O ₂ S: Eu ³⁺ And sulfide-based compound phosphors typified by ZnS: Cu, Al or the like, or rare earth such as (Sr, Ca) S: Eu ²⁺ , CaGa ₂ S ₄ : Eu ²⁺ or SrGa ₂ S ₄ : Eu ²⁺ Doped thiogallate phosphor, phosphor containing at least one composition of aluminate such as TbAlO ₃ : Ce ³⁺ , or YAG such as (Y, Gd) ₃ (Al, Ga) ₅ O ₁₂ Orange firefly made of yttrium, aluminum, garnet) There are photopigments and orange fluorescent dyes.

  Moreover, in order to assist reflection of each inorganic phosphor, excitation light, and wavelength-converted light, for example, scattering materials such as barium sulfate, magnesium oxide, and silicon oxide may be mixed as necessary. Further, a mixed inorganic phosphor in which a plurality of inorganic phosphors having different characteristics are mixed may be used.

  The color conversion plate 1A having the above configuration can be handled as one component and can be used for the light source device 11 shown in FIG. 8, for example. A light source device 11 shown in FIG. 8 includes a case 15 having a stepped recess 14 on a substrate 13 on which an LED (light source) 12 is mounted. For example, silicone) 16 is filled.

  Then, the color conversion plate 1 </ b> A is placed and temporarily mounted on the mounting recess 14 b communicating with the light source side recess 14 a before the light source device 11 is completed. If the LED 12 is driven to emit light in this state, the color-converted light resulting from the mixture of the light emission color of the LED 12 itself and the light subjected to color conversion by the phosphor in the color conversion plate 1A is externally transmitted from the light emitting surface 1b of the color conversion plate 1A. Is emitted.

  If the operation of temporarily mounting the color conversion plate 1A and driving the LEDs 12 to emit light is repeated for each light source device 11 by replacing the color conversion plate 1A, the excitation wavelength is subdivided and varied before the light source device 11 is completed. It can be classified in advance for each group according to the degree. Thereby, the color conversion board 1A can be classified in advance for each emission color obtained in combination with the LED 12 mounted on the light source device 11. And the color conversion board 1A from which a desired color conversion light is obtained when the light source device 11 is completed can be mounted.

  Next, the color conversion plate 1 (1B) according to the second embodiment will be described with reference to FIGS. As shown in FIGS. 2A to 2C, the color conversion plate 1 </ b> B according to the second embodiment includes a pair of transparent plates 2 and 2 and a spacer member 3.

  The pair of transparent plates 2 (2A, 2B) have a flat plate shape having the same shape (rectangular shape in the examples of FIGS. 2 and 3), and are made of transparent glass such as borosilicate glass having a predetermined refractive index. The transparent plates 2A and 2B can be freely selected to some extent from those close to the refractive index of silicone gel 7 described later to those having a high refractive index of 1.8. Further, the transparent plates 2A and 2B can be made of glass having different refractive indexes depending on the application.

  The spacer member 3 is made of, for example, transparent glass made of the same material as the transparent plates 2A and 2B. The outer dimension is substantially the same as that of the transparent plates 2A and 2B, and the flat transparent glass has a predetermined shape (in the example of FIGS. 2 and 3). It is formed in a frame shape having an opening 3a penetrating in a rectangular shape. In addition, the spacer member 3 is fixed in a state where the opening 3a is sandwiched between the pair of transparent plates 2A and 2B from both sides so as to form a space portion 4 sealed with a uniform thickness. Furthermore, at least one through hole 5 (two in the example of FIGS. 2 and 3) that communicates with the space 4 is formed at a predetermined location on the side surface 3b of the spacer member 3.

  In addition, the spacer member 3 can also be comprised not only with transparent glass but with transparent resin. Moreover, the spacer member 3 does not necessarily need to have transparency.

  A silicone gel 7 having a predetermined viscosity (for example, 800 mPa · s) in which a phosphor 6 is dispersed and mixed is formed in a sealed uniform thickness space 4 formed by the pair of transparent plates 2A and 2B and the spacer member 3. It is enclosed.

  In addition, it is preferable that the dimension in the thickness direction of the space part 4 is a uniform dimension within a range of 0.3 to 1.5 mm in consideration of color conversion efficiency. Further, as described above, a material that can obtain desired color-converted light is selected for the phosphor 6 dispersed and mixed in the silicone gel 7 in combination with the light source (LED 12). For example, when a blue light emitting material (InGaN compound) LED is used to obtain white light as color conversion light, an orange fluorescent pigment or an orange fluorescent dye is selected as the phosphor 6.

  In this color conversion plate 1B, the back surface of one transparent plate 2A is a light incident surface 1a from the light source (LED 12), the surface of the transparent plates 2A and 2B on the spacer member 3 side is a light transmission surface 1c, and the other is The surface of the transparent plate 2B is a light emitting surface 1b that emits color-converted light.

  When assembling the color conversion plate 1B having the above-described configuration, as shown in FIG. 3A, the frame-shaped spacer member 3 in which the through holes 5 are formed at two locations on the side surface 3b is used as the transparent plate 2A and the transparent plate 2B. Place between. Then, as shown in FIG. 3B, a pair of transparent plates 2A is formed so as to form a sealed space portion 4 having a uniform thickness (preferably a uniform thickness within a range of 0.3 to 1.5 mm). , 2B and the spacer member 3 are fixed by optical bonding or the like. Thereafter, the two through holes 5 of the spacer member 3 are installed so as to come to the upper surface, and the silicone gel 7 containing the phosphor 6 is injected into the space portion 4 from one through hole 5. The injection of the silicone gel 7 containing the phosphor 6 is performed until the silicone gel 7 containing the phosphor 6 overflows from the other through hole 5. Then, after the silicone gel 7 containing the phosphor 6 is injected, the two through holes 5 are bonded and sealed with, for example, an ultraviolet curable resin. Thereby, the color conversion board 1B as shown in FIG.2 and FIG.3 (c) is completed.

  The color conversion plate 1B having the above configuration can be handled as one component and can be used for the light source device 11 shown in FIG. 8, for example. Then, similarly to the color conversion plate 1A of the first embodiment described above, the color conversion plate 1B is placed and provisionally mounted on the placement recess 14b communicating with the light source side recess 14a in the stage before the light source device 11 is completed. If the LED 12 is driven to emit light in this state, color-converted light, which is a mixture of the light emission color of the LED 12 itself and the light subjected to color conversion by the phosphor 6 in the color conversion plate 1B, is emitted from the light emitting surface 1b of the color conversion plate 1B. It is emitted to the outside.

  If the operation of temporarily mounting the color conversion plate 1B and driving the LED 12 to emit light is repeated for each light source device 11 by replacing the color conversion plate 1B, the excitation wavelength is subdivided and varied before the light source device 11 is completed. It can be classified in advance for each group according to the degree. Thereby, the color conversion board 1B can be classified beforehand for every luminescent color obtained by the combination with LED12 mounted in the light source device 11. FIG. And the color conversion board 1B from which a desired color conversion light is obtained when completing the light source device 11 can be mounted.

  Moreover, although the silicone gel 7 which is easy to deteriorate under the high temperature and high humidity which allows water vapor to pass well is used, the silicone gel 7 containing the phosphor 6 is sealed in the space portion 4 sealed by the pair of transparent plates 2A and 2B and the spacer member 3. Since the structure is sealed, there is no permeation of water vapor, and high durability and high reliability can be obtained even in a high temperature and high humidity environment.

  Furthermore, since the silicone gel 7 containing the phosphor 6 sealed in the space 4 always maintains a uniform thickness with good color conversion efficiency (a uniform thickness within a range of 0.3 to 1.5 mm), the excitation wavelength There is little variation.

  Next, a color conversion plate 1 (1C) according to a third embodiment will be described with reference to FIGS. In addition, the same number is attached | subjected to the component same as the color conversion board 1B of the 2nd form mentioned above, and the description is abbreviate | omitted.

  As shown in FIG. 4, in the color conversion plate 1C of the third embodiment, the spacer member 3 positioned between the pair of transparent plates 2A and 2B is formed of a frame-like screen printing layer made of glass frit. Further, the through hole 5 is formed in an unformed portion of the frame-shaped screen print layer.

  When assembling the color conversion plate 1C having the above configuration, the glass frit is screen-printed in a state in which the positions where the through holes 5 and the spaces 4 are formed in the pair of transparent plates 2A and 2B are masked. Thus, a frame-shaped screen printing layer (spacer member 3) is formed. The screen printing layer has a uniform thickness (preferably within a range of 0.3 to 1.5 mm) when the sealed space portion 4 is formed by overlapping the screen printing layers formed on the pair of transparent plates 2A and 2B. Of uniform thickness), and multilayer printing may be performed as necessary. Then, the pair of transparent plates 2A and 2B on which the screen printing layer is formed are baked under a predetermined condition (for example, 120 ° C. for 10 minutes) and temporarily baked. Thereafter, the screen print layers of the pair of transparent plates 2A and 2B are faced to form a sealed space 4 having a uniform thickness (preferably a uniform thickness within a range of 0.3 to 1.5 mm). The pair of transparent plates 2A and 2B are superposed and baked under a predetermined condition (for example, 580 ° C.). Subsequently, the silicone gel 7 containing the phosphor 6 is injected from the through hole 5, and the through hole 5 is adhered and sealed with, for example, an ultraviolet curable adhesive. Thereby, the color conversion plate 1C as shown in FIG. 5 is completed. For the pair of transparent plates 2A and 2B, materials that match the linear expansion coefficients of both are selected.

  The screen printing layer as the spacer member 3 has a uniform thickness on each of the pair of transparent plates 2A and 2B so that a predetermined thickness (preferably a uniform thickness within a range of 0.3 to 1.5 mm) is obtained. Alternatively, it may be formed on only one transparent plate 2A or 2B.

  The color conversion plate 1C having the above configuration can be handled as one component and can be used for the light source device 11 shown in FIG. 8, for example. Then, similarly to the color conversion plate 1A of the first form and the color conversion board 1B of the second form described above, the color conversion plate 1C is placed on the mounting recess 14b that communicates with the light source side recess 14a before the light source device 11 is completed. Is temporarily mounted. If the LED 12 is driven to emit light in this state, color-converted light, which is a mixture of the light emission color of the LED 12 itself and the light subjected to color conversion by the phosphor 6 in the color conversion plate 1C, is emitted from the light emitting surface 1b of the color conversion plate 1C. It is emitted to the outside.

  If the operation of temporarily mounting the color conversion plate 1C and driving the LED 12 to emit light is repeated for each light source device 11 by replacing the color conversion plate 1C, the excitation wavelength is subdivided and varied before the light source device 11 is completed. It can be classified in advance for each group according to the degree. Thereby, the color conversion board 1 </ b> C can be classified in advance for each emission color obtained in combination with the LED 12 mounted on the light source device 11. And the color conversion board 1C from which a desired color conversion light is obtained when the light source device 11 is completed can be mounted.

  Moreover, although the silicone gel 7 which is easy to deteriorate under the high temperature and high humidity which allows water vapor to pass well is used, the phosphor 6 is contained in the space portion 4 sealed by the pair of transparent plates 2A and 2B and the spacer member 3 by the screen printing layer. Since the silicone gel 7 is sealed, there is no permeation of water vapor, and high durability and high reliability can be obtained even in a high temperature and high humidity environment.

  Furthermore, since the silicone gel 7 containing the phosphor 6 sealed in the space 4 always maintains a uniform thickness with good color conversion efficiency (a uniform thickness within a range of 0.3 to 1.5 mm), the excitation wavelength There is little variation.

  Next, a color conversion plate 1 (1D) according to a fourth embodiment will be described with reference to FIG. In addition, the same number is attached | subjected to the component same as the color conversion board 1B of the 2nd form mentioned above, and the description is abbreviate | omitted.

  As shown in FIG. 6, the color conversion plate 1 </ b> D of the fourth embodiment has a pair of transparent portions that form a sealed space portion 4 having a uniform thickness (preferably a uniform thickness within a range of 0.3 to 1.5 mm). Only the phosphor 6 is applied in advance to the inner surfaces (light transmission surfaces 1c) of the plates 2A and 2B, and an inert gas is sealed from the through hole 5 into the space portion 4 as necessary, and the through hole 5 is cured by, for example, ultraviolet light. Adhere with mold resin and seal.

  Similarly to the first to third color conversion plates 1A to 1C described above, the fourth color conversion plate 1D configured as described above can be handled as one component, and the color conversion plate 1D is temporarily mounted. If the operation of driving the LEDs 12 to emit light is repeated for each light source device 11 by replacing the color conversion plate 1D, the excitation wavelength is subdivided and the classification is performed in advance for each group according to the degree of variation before the light source device 11 is completed. be able to. Thereby, color conversion board 1D can be classified beforehand for every luminescent color obtained by the combination with LED12 mounted in the light source device 11. FIG. And color conversion board 1D from which a desired color conversion light is obtained when completing the light source device 11 can be mounted.

  Further, according to the color conversion plate 1D of the fourth embodiment, stable color conversion light can be obtained without using unstable silicone under a high temperature and high humidity environment.

  By the way, in the configuration of the color conversion plates 1A to 1D of the first to fourth embodiments described above, as shown in FIG. 7, the dot portion 8 having a fine convex shape may be formed on the light emitting surface 1b. The dot portion 8 is not limited to a fine convex shape, and may be formed by a fine concave shape or a combination of a fine convex shape and a fine concave shape. As a result, the light color-converted by the color conversion plate 1 can be extracted at the light exit surface 1b by refraction or reflection at the dot portion 8, thereby improving the efficiency.

  Although not shown, the dot portion 8 can be formed on a wall surface in the space portion 4 (light transmission surface 1c, inner wall surface of the spacer member 3) to refract and reflect light in the space portion 4. .

  Moreover, although the color conversion plates 1A to 1D in the above-described embodiments have been described by taking the case where the appearance shape is a rectangle as an example, it is not limited to a rectangle. For example, various shapes such as a square, a hexagon, and a circle are conceivable, and an optimal shape can be selected as appropriate according to the intended use.

  Thus, according to the color conversion plate of this example, it can be easily handled as one component. Before the light source device is completed, a color conversion plate is temporarily mounted on the light source device and the light source is driven to emit light, thereby subdividing the excitation wavelength and classifying the color conversion plate in advance according to the degree of variation. As a result, it is possible to supply the optimum light source according to the wavelength of the light source and for each application.

  Moreover, according to the structure which sealed the silicone gel containing fluorescent substance in the space part formed between a pair of transparent plate and a frame-shaped spacer member like a 2nd form or a 3rd form, Even if it is used, there is no permeation of water vapor into the space, and high yield strength and high reliability in a high temperature and high humidity environment can be obtained.

  Further, a phosphor is applied to a wall surface through which light in a space sealed with a uniform thickness is transmitted by a pair of transparent plates and a frame-shaped spacer member, or a silicone gel containing a phosphor is placed in the sealed space According to the enclosed configuration, the thickness of the space portion is always maintained at a constant thickness by the pair of transparent plates and the frame-shaped spacer member, so that there is little variation in excitation wavelength.

  Further, if the spacer member 3 is formed of a screen printing layer as in the third embodiment, it can be produced using an existing established screen printing technique, and mass productivity can be improved.

  Furthermore, as shown in FIG. 7, if a fine convex or concave dot portion 8 is formed on the light emitting surface 1 b, the extraction efficiency of the color conversion light can be improved by refraction and reflection at the dot portion 8.

It is a figure which shows the 1st form of the color conversion board which concerns on this invention. (A) It is a top view which shows the 1st form of the color conversion board which concerns on this invention. (B) It is a side view which shows the 1st form of the color conversion board which concerns on this invention. (C) It is sectional drawing which shows the 1st form of the color conversion board which concerns on this invention. (A)-(c) It is a figure which shows the manufacturing process of the color conversion board of FIG. It is a figure which shows the 3rd form of the color conversion board which concerns on this invention. It is a fragmentary sectional view of the color conversion board of FIG. It is a fragmentary sectional view showing the 4th form of the color conversion board concerning the present invention. It is a fragmentary sectional view showing other examples of composition of a color conversion board concerning the present invention. It is a schematic sectional drawing which shows an example of the light source device using the color conversion board which concerns on this invention. It is sectional drawing of the conventional light source device using the color conversion material disclosed by patent document 1. FIG.

Explanation of symbols

1 (1A to 1D) Color conversion plate 1a Light incident surface 1b Light transmitting surface 1c Light emitting surface 2 (2A, 2B) Transparent plate 3 Spacer member 4 Space portion 5 Through hole 6 Phosphor 7 Silicone gel 8 Dot portion 11 Light source device 12 LED
13 Substrate 14 Stepped recess 14a Light source side recess 14b Placement recess 15 Case 16 Filler

Claims (5)

A color conversion plate characterized in that phosphors are dispersed and mixed in silicone rubber or silicone resin to form a uniform thickness. A pair of opposed transparent plates;
A frame-shaped spacer member fixed between the pair of transparent plates so as to form a space sealed in an even thickness,
A color conversion plate, wherein a phosphor is attached to a wall surface through which light in the space portion is transmitted. A pair of opposed transparent plates;
A frame-shaped spacer member fixed between the pair of transparent plates so as to form a space portion hermetically sealed with a uniform thickness, and having a through hole that leads to the space portion;
A color conversion plate, wherein a silicone gel in which a phosphor is dispersed and mixed is sealed in the space portion from the through hole, and the through hole is sealed. 4. The color conversion plate according to claim 3, wherein the spacer member comprises a screen printing layer. 5. The color conversion plate according to claim 1, wherein fine convex and / or concave dot portions are formed on the light emitting surface.

Images