JP6199456B2 - Wide light distribution type straight tube LED lamp - Google Patents

Description

  The present invention relates to a straight tube LED lamp, and more particularly to a wide light distribution type straight tube LED lamp. By filling the diffused light-transmitting ceramic particles between the inner tube wall of the straight tube lamp and the LED light source, the thermal resistance can be lowered, the light can be softened and the blue light can be prevented from leaking outside. .

  Filament type LED bulbs manufactured with a wide light distribution type LED light bar, commonly referred to as LED filaments, have gradually attracted market attention, but the market has not been cultivated throughout the last few years, the main cause of which is the filament type This is because the heat dissipation problem of LED bulbs still needs to be overcome, and the price and performance are not meeting market expectations. First, in order to solve the heat dissipation problem, most of the filament type LED bulb products on the market currently radiate heat by enclosing helium gas in a glass shell. Compared with the general thermal conductivity of air, the filling of helium gas can improve the thermal conductivity of about six times. However, the filament type LED bulb has an actual helium gas thermal conductivity of only 0.159 W / m.e. Even if it withstands high temperatures during flame processing and a very low yield in the manufacturing process. Therefore, the filament-type LED light bulb products on the market currently deal with the problem of insufficient heat radiation capability that the glass bulb shell is filled with helium gas by halving the LED driving current.

  Generally, the heat conductivity of a transparent resin adhesive after curing is about 0.3 W / m. With K, you can inject and fill a transparent resin adhesive into a wide light distribution type LED light bar to increase the heat generating surface area during operation of the light emitting diode light bar, but the yellowing of the transparent resin adhesive is the product life Affects. And the most obvious adverse effects of chemical incompatibility of resin adhesives are blue light, indigo light and its derived white light LED, which allows designers to fully reduce the effects between chemicals In particular, it is a resin-based adhesive that is directly injected and filled into the LED. When it must be used in an unavoidable situation, in addition to selecting a resin-based adhesive with excellent compatibility and high weather resistance, pressure on manufacturing costs caused by high material costs must be considered.

  In order to enhance the heat dissipation capability of the wide light distribution type LED light bar itself, the transparent substrate to be combined is changed from a glass to a single crystal aluminum oxide ceramic substrate, which is expensive and has good thermal conductivity, and sapphire In order to stand out the advantage of good thermal conductivity of the ceramic substrate, the phosphor layer applied to the entire circumference of the transparent substrate was changed to be applied to both the upper and lower sides of the sapphire ceramic substrate, and both the left and right sides of the sapphire ceramic substrate were external Although the heat radiation capability is enhanced by exposing the light to the blue light, the problem that the blue light leaks out to the outside on the left and right sides of the substrate is derived for the white light illuminator in which the phosphor layer is added to the blue light LED. Besides this, the mechanical strength of sapphire ceramic is much better than glass, but the material cost is high, so the thickness of the sapphire ceramic substrate is deliberately reduced, so the wide light distribution type LED light bar with sapphire ceramic substrate is special Vulnerable and easy to break. In addition, in order to resist the oxidative corrosion of moisture, sulfides, and other environmental factors, the wide light distribution type LED light bar combined with the sapphire ceramic substrate is suitable for practical applications. Don't be. Therefore, how to reduce the thermal resistance between the tube wall of the bulb and the LED light source, soften the light, and how to avoid the blue light leaking out is overcome and solved. It becomes a problem that must be done.

Then, an object of this invention is to provide the wide light distribution type straight tube | pipe LED lamp which reduces thermal resistance and can avoid that blue light leaks outside.

  The thermal conductivity of a light-transmitting medium often seen is that hot air is about 0.0316 W / m. K, helium gas is about 0.18 W / m. K, plastic is about 0.25 W / m. K, epoxy resin is about 0.3 W / m. K, silicone is about 0.5 W / m. K etc. Other commonly seen ceramic media have a thermal conductivity of about 1.1 W / m. K, quartz glass is about 1.5 W / m. K, single crystal aluminum oxide is 46 W / m. K, polycrystalline aluminum oxide is 28 W / m. K, zirconium oxide was 1.8 W / m. K, silicon carbide of 126 W / m. K, silicon nitride is 27 W / m. K, boron carbide is 40 W / m. K, boron nitride is 30 W / m. K, aluminum nitride is 160 W / m. K etc.

  Ceramic refers to metal oxides or non-metal oxides, carbides or nitrides, and examples thereof include potassium oxide, sodium oxide, silicon oxide and the like. Since glass is a mixture of potassium oxide, sodium oxide, silicon oxide, etc., it belongs to one type of ceramic material. The ceramic material has high temperature resistance and high thermal conductivity, and does not have an adverse effect of chemical incompatibility with the LED. In particular, a ceramic material capable of transmitting light is advantageous for LED light transmission / heat conduction applications.

  The dry and diffuse particle material has low frictional force between particles and good fluidity, and in an appropriate vibration, the gap between the inner tube wall of the bulb and the light source of the light emitting diode is closely filled, and the process The dry and diffuse particulate material fills the light emitting diode light source like the hourglass sand, which is also very important for the fragile wide light distribution type LED light bar in the examples. First, the flow filling process of particles does not cause mechanical surface friction or compression damage to the wide light distribution type LED light bar. Second, thermal expansion / cooling / shrinkage during operation of the wide light distribution type LED light bar is not affected, and fatigue damage due to internal stress does not occur due to the limited coating of the particulate material.

  The diffused light-transmitting ceramic particle material filled between the inner tube wall of the bulb and the LED light source has an inverse relationship between the size of the porosity and the heat conduction capacity, and the size of the porosity and the light-transmitting ceramic particles Is proportional, and the size of the light-transmitting ceramic particles and the light transmittance are in a proportional relationship. Therefore, the particles are small, the porosity is small, and the heat conduction ability is large, but the light transmittance is small. Therefore, the size of the particles is selected such that the volume equivalent particle size is larger than 0.05 millimeters because the translucency of particles of 0.05 millimeters or less is poor. Moreover, since the heat conductivity is poor when the porosity is large, the requirement for the porosity of the diffused light-transmitting ceramic particle material filled between the inner tube wall of the bulb and the light source of the light emitting diode must be less than 50%. Don't be.

  The relationship between the size of the porosity and the thermal conductivity is inversely proportional, the relationship between the size of the porosity and the size of the light-transmitting ceramic particles is proportional, and the relationship between the size of the light-transmitting ceramic particles and the light transmittance is Become. Thus, in a preferred embodiment, a particle size arrangement that satisfies light transmission and heat conduction is disclosed.

In an embodiment, speaking of marbles having different sizes, the void ratios for filling individual vibrations of sizes are as follows.
0.05mm diameter is 0.3 porosity,
0.1 mm diameter is 0.33 porosity,
0.6mm diameter is 0.38 porosity,
The 2.0 mm diameter is 0.4 porosity.
The void ratio for vibration filling by mixing the sizes is as follows.
0.05 mm diameter with a weight ratio of 22.7% + 0.6 mm diameter with a weight ratio of 77.3%, 0.21 porosity 0.1 mm diameter with a weight ratio of 17.8% + 0 with a weight ratio of 82.2% .6mm diameter is 0.24 porosity.
0.6 mm diameter with a weight ratio of 11.6% + 2.0 mm diameter with a weight ratio of 88.4% is 0.32 porosity.
As can be seen from the above, the mixed size filling is smaller than the porosity that individually fills larger or smaller ones and also has the light transmittance of most large particles.

  The appearance shape of the particles affects the frictional force between the particles, and the fluidity increases when the frictional force is small. The magnitude of the frictional force between the particles and the angle of repose are proportional to each other. The angle of repose of the appearance of the particles is 23 ° to 28 ° for each spherical particle, 30 ° for regular shaped particles, and 30 ° for irregular shaped particles. 35 °, very irregular shaped particles will be 40 °. As can be seen from the above, spherical particles selected under the same volume equivalent particle size in one example have a relatively low porosity. The irregular surface of the light-emitting diode light bar is coated and contacted with a diffused light-transmitting ceramic particle material, and the particles of the particle material and adjacent particles are in contact with each other, and since the porosity is small, the thermal resistance is lowered and the thermal conductivity is reduced. Can be improved.

  In addition, in the embodiment, the wide light distribution type LED light bar that combines the sapphire ceramic substrate, coats the phosphor layer on the upper and lower sides of the glass cloth substrate, and is exposed on both the left and right sides of the substrate is diffused light-transmitting ceramic particles. Refraction of light incident on materials, scattering action, phosphor layer when emitting light and more uniform light mixing action can increase the color rendering index of the emitted light and lower the color temperature, and at the same time soften the light, Glare can be reduced, and blue light can be prevented from leaking outside.

  Adhesion between particles affects the frictional force, and when particles are wet and a liquid film is present, the frictional force between particles increases, filling fluidity decreases, and compression molding occurs when fluidity decreases. Or it must be filled with high pressure injection, which causes mechanical surface friction and compression damage for the fragile wide light distribution type LED light bar. And this also affects the porosity between the inner tube wall of the bulb and the LED light source due to the diffuse light transmissive ceramic particles, and the particles and adjacent particles are not in direct contact due to the presence of the liquid film. Increased and thermal resistance increased. Therefore, before filling the diffused light-transmitting ceramic particles between the inner tube wall of the bulb and the LED light source, it is necessary to clean and dry the oil film first.

  The refractive index can be increased between the particles by adding liquid or colloid between the particles similar to the refractive index of the light-transmitting ceramic particles, but the preferred form is the inner tube wall of the bulb and the light emitting diode light source first. Between the particles, a light-transmitting ceramic particle material having a porosity of less than 50% and in contact with adjacent particles is filled, and then a liquid or colloid similar to the refractive index is dropped. Naturally, the adverse effect of chemical incompatibility of the liquid and colloid and yellowing affect the life of the product and increase troubles. In addition, since the refractive index is filled between the particles with liquid and colloid similar to the refractive index of light-transmitting ceramic particles, the light transmittance is increased, but this causes scattering and refraction of light between diffuse ceramic particle materials. , Softening the light, reducing glare, and giving the positive effect of avoiding blue light leaking out.

  In view of the foregoing, the present invention provides a wide light distribution type straight tube LED lamp, the wide light distribution type straight tube LED lamp includes a tube, and the tube is open at both ends or one end. . The tube has an LED light source, and the LED light source has at least two electric connection lines, and the two electric connection lines are each drawn from both ends of the tube and connected to the tube, or two The electrical connection lines are pulled out from one end opening of the tube together and connected to the tube. The opening at both ends of the tube or the opening at one end of the tube is closed with a plug.

  In the wide light distribution type straight tube LED lamp, the LED light source includes at least one wide light distribution type LED light bar. The wide light distribution type LED light bar has a plurality of LED chips, and the plurality of LED chips include a blue light LED chip and LED chips of other colors.

  A diffused light transmissive ceramic particle material is filled between the inner tube wall of the bulb and the LED light source (light emitting diode light source). The particles of diffuse light transmissive ceramic particulate material are in contact with adjacent particles, and the porosity of the diffuse light transmissive ceramic particulate material is below 50%. Diffuse light transmissive ceramic particle materials include primary ceramic particles, gap filling ceramic particles, and ceramic particle fragments. The volume-equivalent particle size of the diffuse light-transmitting ceramic particle material is greater than 0.1 mm for the main ceramic particles, more than 0.05 mm for the gap filling ceramic particles, and less than 0.1 mm for the ceramic particle fragments. Below 0.05 mm. The volume occupancy of the diffuse light transmissive ceramic particle material is greater than 60% for the main ceramic particles, less than 40% for the gap filling ceramic particles, and less than 20% for the ceramic particle debris.

  In the filling process of the main ceramic particles of different sizes, ceramic particles for gap filling and ceramic particle fragments, it can be divided and continuously put in proportion at the same time. When filling the tube, the blades provided rotate and mix by stirring . The tube is vibrated during the filling process of diffuse light transmissive ceramic particles and / or after quantitative filling, and the vibration method encompasses linear and torsional vibrations. The particles of diffuse light transmissive ceramic particulate material are in contact with adjacent particles. The contact between the particles of the diffuse light-transmitting ceramic particle material and the adjacent particles means that the diffuse light-transmitting ceramic particle material falls and accumulates between the inner tube wall of the bulb and the LED light source, and between the particles. This means that the positions of the coordinates are randomly distributed and form a stationary particle support structure under dense deposition, and the particles in the particle support structure are in contact with the adjacent particle support relationship.

  In the wide light distribution type straight tube LED lamp, the tube is a transparent tube or a color tube.

  In the wide light distribution type straight tube LED lamp, the material of the bulb is a plastic material, a glass material or a ceramic material.

  In the wide light distribution type straight tube LED lamp, the glass material is quartz glass, sodium glass, calcium glass, potassium glass, lead glass, boron glass, or a glass material mixed in any combination, or The glass material is a glass material in which two or more different metal oxides or non-metal oxides are mixed.

  In the wide light distribution type straight tube LED lamp, the ceramic material is single crystal aluminum oxide or polycrystalline aluminum oxide.

  In the wide light distribution type straight tube LED lamp, the light-transmitting ceramic particle material is transparent particles or colored particles. The color of the colored particles is red, orange, yellow, green, blue, purple, or a color obtained by mixing two or any of these colors.

  In the wide light distribution type straight tube LED lamp, the appearance shape of the particles of the light-transmitting ceramic particle material is regular shaped particles or irregular shaped particles.

  In the wide light distribution type straight tube LED lamp, the light-transmitting ceramic particle material is ceramic particles of single crystal aluminum oxide or polycrystalline aluminum oxide.

  In the wide light distribution type straight tube LED lamp, the light-transmitting ceramic particle material is glass particles. The glass particles are quartz glass particles, sodium glass particles, calcium glass particles, potassium glass particles, lead glass particles, boron glass particles, or glass particles mixed in any combination, or the glass particles are variously different. Glass particles mixed with metal oxide or nonmetal oxide are used.

  Compared to the prior art, the present invention has the following advantages. That is, in the wide light distribution type straight tube LED lamp provided in the present invention, a diffuse light transmissive ceramic particle material is filled between the inner tube wall of the bulb and the LED light source, and the diffuse light transmissive ceramic particle material is an LED. Covers and contacts the irregular surface of the light source, reduces thermal resistance, improves thermal conductivity, and scattering and refraction of light between diffuse light-transmitting ceramic particle materials softens the light and reduces glare In addition, it has a positive effect of preventing blue light from leaking outside.

It is a schematic diagram which shows the structure of the LED light source which concerns on Example 1 and Example 2 of this invention; That is, it is a wide light distribution type LED light bar which has a fluorescent substance layer. It is sectional drawing of the LED light source which concerns on Example 1 and Example 2 of this invention actual; That is, it is a wide light distribution type LED light bar which has a fluorescent substance layer. It is a schematic diagram which shows the structure of Example 1 of this invention. It is sectional drawing of Example 1 of this invention. It is a partial expanded view of sectional drawing of Example 1 of this invention. It is a schematic diagram which shows the structure of Example 2 of this invention. It is sectional drawing of Example 2 of this invention. It is a partial expanded view of sectional drawing of Example 2 of this invention. It is a schematic diagram which shows the structure of the LED light source which concerns on Example 3 and Example 4 of this invention; That is, it is a wide light distribution type LED light bar which does not have a fluorescent substance layer. It is sectional drawing of the LED light source which concerns on Example 3 and Example 4 of this invention; That is, it is a wide light distribution type LED light bar which does not have a fluorescent substance layer. It is a schematic diagram which shows the structure of Example 3 of this invention. It is sectional drawing of Example 3 of this invention. It is a partial enlarged view of a sectional view of Example 3 of the present invention. It is a schematic diagram which shows the structure of Example 4 of this invention. It is sectional drawing of Example 4 of this invention. It is a partial enlarged view of sectional drawing of Example 4 of the present invention. It is a schematic diagram which shows the structure of the LED light source which concerns on Example 5 of this invention; That is, it is a wide light distribution type LED light bar which expands a board | substrate and does not have a fluorescent substance layer in a die-bonding surface. It is sectional drawing of the LED light source which concerns on Example 5 of this invention; That is, it is a wide light distribution type LED light bar which expands a board | substrate and does not have a fluorescent substance layer in a die-bonding surface. It is a schematic diagram which shows the structure of Example 5 of this invention. It is sectional drawing of Example 5 of this invention. It is a partial enlarged view of sectional drawing of Example 5 of the present invention. It is a schematic diagram which shows the random refraction effect | action with respect to the light of a light transmissive ceramic particle material.

  Specific embodiments of the present invention will be described in combination with the accompanying drawings in order to provide a clearer understanding of the technical solution, objects, and effects of the present invention.

1a and 1b are a schematic view and a sectional view showing the structure of an LED light source according to Example 1 and Example 2 of the present invention; that is, a wide light distribution type LED light bar having a phosphor layer. Wide light distribution type LED light bar 20 having a phosphor layer; a plurality of LED chips 10 are die-bonded and wire-bonded 11 on one side of the sapphire ceramic substrate 12 and a blue light LED chip (excluding blue light) and others Color LED chips. The phosphor layer 14 is applied to both the upper and lower sides of the sapphire ceramic substrate 12, and the right and left sides of the sapphire ceramic substrate 12 are exposed to the outside to enhance the heat dissipation capability, and for a white light illuminator in which a phosphor layer is added to a blue LED. The 16 problems that the blue light on the left and right sides of the substrate leaks to the outside are derived.
Example 1

  FIG. 2a is a schematic diagram showing the structure of the first embodiment of the present invention. FIG. 2b is a cross-sectional view of the first embodiment of the present invention. The alphabetic capital letter A in FIG. 2c shows a partially enlarged view in the cross-sectional view, the tube 22 having an open end includes a plug 26 that closes the opening, and the LED light source 18 is in the tube 22 having an open end, The LED light source 18 includes at least two electrical connection lines 24, and is drawn out from one end opening of the tube together and connected to the tube. The tube 22 opened at one end includes a tube of plastic, glass, or ceramic material. The tube 22 opened at one end includes a transparent tube or a color tube (that is, a colored tube). The LED light source 18 in Example 1 is composed of two wide light distribution type LED light bars 20 connected in series and having a phosphor layer. A diffused light-transmitting ceramic particle material is filled between the inner tube wall 23 of the bulb and the LED light source 18. Diffuse light transmissive ceramic particulate material particles and adjacent particles contact 30. Diffuse light transmissive ceramic particulate material particles and adjacent particle contact 30 cause the diffuse light transmissive ceramic particulate material to fall and deposit between the inner tube wall 23 of the bulb and the LED light source 18, This means that the positions of the coordinates between the particles are randomly distributed and form a stationary particle support structure under dense deposition, and the particles in the particle support structure are in contact with the adjacent particle support relationship. In addition, the porosity of the light-transmitting ceramic particle material is required to be less than 50%, because if the porosity of the light-transmitting ceramic particle material is more than 50%, it is disadvantageous for lowering the thermal resistance and improving the thermal conductivity. It is. The diffuse light transmissive ceramic particle material includes primary ceramic particles 28, gap filling ceramic particles 32, and ceramic particle fragments 33. The volume equivalent particle size of the diffuse light transmissive ceramic particle material is such that the primary ceramic particles 28 are each greater than 0.1 mm, the gap filling ceramic particles 32 are greater than 0.05 mm, and less than 0.1 mm. Debris 33 is below 0.05 mm. The volume occupancy of the diffuse light transmissive ceramic particle material is greater than 60% for the main ceramic particles 28, less than 40% for the gap filling ceramic particles 32, and less than 20% for the ceramic particle debris 33. In the filling process of the main ceramic particles 28 of different sizes, the gap filling ceramic particles 32, and the ceramic particle fragments 33, the blades provided can be continuously charged separately at a ratio at the same time. Rotate and stir to mix. During the filling process of diffuse light-transmitting ceramic particles and / or after quantitative filling, the tube 22 with one end opened is vibrated, and the vibration method includes linear vibration and torsional vibration. Diffuse light transmissive ceramic particulate material particle-to-adjacent particle contact 30 encompasses primary ceramic particles 28, gap filling ceramic particles 32 and ceramic particle debris 33, contact between adjacent or adjacent particles of the same size or different sizes. .

  The main ceramic particles 28 can reduce thermal resistance, improve thermal conductivity, and light scattering and refraction between the main ceramic particles can soften the light, and blue light can be prevented from leaking outside. Therefore, it has a positive effect.

  The gap-filling ceramic particles 32 assist in reducing the porosity and assist in lowering thermal resistance and improving thermal conductivity. However, when the gap-filling ceramic particles 32 are added, a diffused light-transmitting ceramic particle material is formed. The light transmittance will be reduced.

  The ceramic particle debris 33 is formed by dust particles adhering to the surface of the main ceramic particles 28, gap filling ceramic particles 32, and the like, and vibration shock during the filling process. The ceramic particles 32 are broken into ceramic particle fragments 33. The smaller the debris 33 of the ceramic particles, the better. The scattering and refraction effects on the light between the fine particles are too large, which is disadvantageous for light transmission.

  The light-transmitting ceramic particle material includes transparent particles and colored particles.

The appearance shape of the particles of the light-transmitting ceramic particle material includes regular light-transmitting ceramic particles and irregular light-transmitting ceramic particles. The regular light-transmitting ceramic particles are spherical, ball-shaped, symmetrical cube-type light-transmitting ceramic particles, and the irregular light-transmitting ceramic particles are sheet-shaped, plate-shaped, asymmetric cube-type, etc. light-transmitting ceramic particles Particles.

  In one embodiment, the light transmissive ceramic particle material is single crystal aluminum oxide or polycrystalline aluminum oxide ceramic particles.

In one embodiment, the light transmissive ceramic particulate material is glass particles. The glass particles are quartz glass particles, sodium glass particles, calcium glass particles, potassium glass particles, lead glass particles, boron glass particles, or glass particles mixed in any combination, or two or more different metal oxides. Or glass particles mixed with a non-metal oxide.
<< Example 2 >>

FIG. 3a is a schematic diagram showing the structure of Example 2 of the present invention. FIG. 3b is a cross-sectional view of Embodiment 2 of the present invention. The capital letter B in FIG. 3c shows a partially enlarged view in the cross-sectional view. The LED light source of Example 2 and Example 1 is the same, and the difference between Example 2 and Example 1 is a difference in tube type. The tube 38 having both ends opened in the second embodiment is a plug 36 that closes the opening at both ends (that is, when both ends of the tube are opened, the openings at both ends of the tube are closed by the plug 36, or the tube When one end is open, the plug 26 is used to close the opening at one end of the tube), the LED light source 18 is in the tube 38 open at both ends, and the LED light source 18 is connected in series in two, A wide light distribution type LED light bar 20 having a phosphor layer is used. The LED light source 18 includes two electrical connection lines 34, each of which is drawn out from the opening at both ends of a tube 38 having both ends opened and connected to the tube 38 having both ends opened. A diffused light-transmitting ceramic particle material is filled between the inner tube wall 40 of the bulb and the LED light source 18, and the particles of the diffused light-transmitting ceramic particle material are in contact with adjacent particles 48, so that the light-transmitting ceramic particles are in contact with each other. The material includes primary ceramic particles 42, gap filling ceramic particles 44, and ceramic particle fragments 46.

4a and 4b are a schematic view and a cross-sectional view showing the structure of the LED light source according to Example 3 and Example 4 of the present invention; a wide light distribution type LED light bar having no phosphor layer. Wide light distribution type LED light bar 50 having no phosphor layer; the plurality of LED chips 10 are die-bonded and wire bonded 11 on one side of the upper and lower sides of the sapphire ceramic substrate 12, and the blue light LED chip and LED chips of other colors Including. The sapphire ceramic substrate 12 does not cover the phosphor layer, and the heat dissipation capability is improved by exposing the top, bottom, left and right to the outside, and in the tube or on the outer tube wall with respect to the white light illuminator of the blue light LED Make a remote phosphor layer.
Example 3

FIG. 5a is a schematic diagram showing the structure of Example 3 of the present invention. FIG. 5b is a cross-sectional view of Embodiment 3 of the present invention. The capital letter C in FIG. 5c shows a partially enlarged view in the cross-sectional view. The difference between the third embodiment and the first embodiment is that the LED light source 52 is composed of two wide light distribution type LED light bars 50 connected in series and having no phosphor layer. Since the sapphire ceramic substrate 12 is not covered with the phosphor layer, the top, bottom, left, and right are exposed to the outside and come into contact with the diffused light-transmitting ceramic particle material, thereby increasing the heat dissipation capability. In this embodiment, a remote phosphor layer is manufactured on the inner tube wall 60 for a white light illuminator of a blue light emitting diode. The tube 54 opened at one end is provided with a plug 56 that closes the opening, and the LED light source 52 is provided in the tube 54 opened at one end. The LED light source 52 includes at least two electrical connection lines 58, together. Pull out from one end opening of the tube and connect to the tube. A diffused light transmissive ceramic particle material is filled between the inner tube wall 60 of the bulb and the LED light source 52. Diffuse light transmissive ceramic particulate material particles and adjacent particles make contact 68. The diffuse light transmissive ceramic particle material includes primary ceramic particles 62, gap filling ceramic particles 64, and ceramic particle debris 66.
Example 4

FIG. 6a is a schematic diagram showing the structure of the fourth embodiment of the present invention. FIG. 6b is a cross-sectional view of Embodiment 4 of the present invention. The capital letter D in FIG. 6c shows a partially enlarged view in the cross-sectional view. The LED light source of Example 4 and Example 3 is the same, and the difference between Example 4 and Example 3 is a difference in tube type. The tube having one end opened in this embodiment is composed of a semicircular arc cover 70 and a solid semicircular rod 74. The LED light source 52 is composed of two wide light distribution type LED light bars 50 connected in series and having no phosphor layer. The sapphire ceramic substrate 12 of the wide light distribution type LED light bar 50 having no phosphor layer is in close contact with the die bond surface 86 of the solid semicircular bar 74, and the semicircular arc cover 70 and the solid semicircular bar 74 are made of glass and Manufactured with single crystal aluminum oxide ceramic or polycrystalline aluminum oxide ceramic, it is advantageous for heat conduction. In the present embodiment, the tube having one end opened includes a plug 76 that closes the opening, the LED light source 52 is provided in the tube having one end opened, and the LED light source 52 includes at least two electrical connection lines 77. , Together pull out from one end opening of the tube and connect to the tube. In the present embodiment, a diffused light-transmitting ceramic particle material is filled between the inner tube wall of the bulb and the light source of the light emitting diode, and the inner wall 78 of the cover 70 having a semicircular arc shape and a solid semicircle. It is composed of a die-bonding surface 86 of the rod 74 and is filled with a diffuse light-transmitting ceramic particle material between the LED light source 52 and the particles of the diffuse light-transmitting ceramic particle material and adjacent particles are in contact with each other. The light transmissive ceramic particle material includes primary ceramic particles 80, gap filling ceramic particles 82, and ceramic particle fragments 84. In this embodiment, a remote phosphor layer is manufactured on the outer circular arc wall 72 of the semicircular arc-shaped cover 70 and the outer circular wall 75 of the solid semicircular bar 74 for the white light illuminator of the blue light LED.
Example 5

  7a and 7b are a schematic view and a cross-sectional view showing the structure of an LED light source according to Example 5 of the present invention; that is, a wide light distribution type LED light bar having a wide substrate and no phosphor layer on the die bond surface. It is. Wide light distribution type LED light bar 88 having a wide substrate and no phosphor layer on the die bond surface; the plurality of LED chips 10 are die-bonded and wire-bonded 11 on the die bond surface 94 of the ceramic substrate 92, and on the die bond surface 94 Have no phosphor layer. The plurality of LED chips 10 include a blue light LED chip and LED chips of other colors. The ceramic substrate 92 is made of glass, single crystal aluminum oxide ceramic, or polycrystalline aluminum oxide ceramic, and is advantageous for heat conduction.

  FIG. 8a is a schematic diagram showing the structure of Example 5 of the present invention. FIG. 8 b is a cross-sectional view of Embodiment 5 of the present invention. The capital letter E in FIG. 8c shows a partially enlarged view in the cross-sectional view. The difference between Example 5 and Example 1 is the difference between the LED light source and the tube type. The LED light source of the present embodiment is a wide light distribution type LED light bar 88 that widens the substrate and has no phosphor layer on the die bond surface. The tube whose one end is open is composed of a wide light distribution type LED light bar 88 and a semicircular groove cover 98 which widen the substrate and has no phosphor layer on the die bond surface. In this embodiment, the tube having one end opened is provided with a plug 110 that closes the opening, the LED light source is in the tube having one end opened, the substrate is widened, and there is no phosphor layer on the die bond surface. The light type LED light bar 88 is provided with at least two electrical connection lines 112, which are drawn together from one end opening of the tube and connected to the tube. In this embodiment, a wide light distribution type LED in which a diffused light-transmitting ceramic particle material is filled between the inner tube wall of the bulb and the light-emitting diode light source, and the inner tube wall of the bulb has no phosphor layer on the die bond surface. The light bar 88, the die bond surface 94 of the ceramic substrate 92, and the inner groove wall 96 of the semicircular groove cover 98 are in contact 108 with particles of diffuse light transmissive ceramic particle material and adjacent particles. The light transmissive ceramic particle material includes primary ceramic particles 102, gap filling ceramic particles 104, and ceramic particle fragments 106. The ceramic substrate 92 and the semicircular groove cover 98 are made of glass, single crystal aluminum oxide ceramic, and polycrystalline aluminum oxide ceramic, and are advantageous for heat conduction. A remote phosphor layer is fabricated on the outer surface 100 of the semicircular groove cover 98 and the substrate outer surface 90 of the ceramic substrate 92 for the white light illuminator of the blue LED.

  FIG. 9 is a schematic diagram showing the random refraction effect of light-transmitting ceramic particle material on light. Incident light 114 enters the light-transmitting ceramic particle material, part of which is transmitted to become irregularly refracted light 116, and part of it is internally reflected to become irregularly reflected light 118. In the wide light distribution type LED light bar 20 having the phosphor layer in Example 1 and Example 2, the phosphor layer 14 is applied on both upper and lower sides of the sapphire ceramic substrate 12, and both the left and right sides of the sapphire ceramic substrate 12 are exposed to the outside. The exposure increases the heat dissipation capability, and the blue light on both the left and right sides of the substrate leaks outside 16. The fact that the blue light leaks to the outside 16 enters the light-transmitting ceramic particle material like the incident light 114, part of it is transmitted through the irregularly refracted light 116, and the angle of the outgoing light is changed to produce white light. To prevent the blue light from leaking to the outside, a part of the light is internally reflected to be irregularly reflected light 118 and mixed into the phosphor layer 14 to increase the color rendering index of the emitted light and the color temperature. Can be reduced. In Example 3, Example 4, and Example 5, the random refraction effect on the light of the light-transmitting ceramic particle material can soften the light and reduce the glare. Alphabet capital letters A, B, C, D, E, F, G, and H of incident light 114 indicate that parallel incident light at different positions enters the light transmissive ceramic particles. Alphabet capital letters A ′, B ′, C ′, D ′, E ′, F ′, G ′, and H ′ of the irregular refraction light 116 are obtained after the incident light 114 passes through the light-transmitting ceramic particles. It shows that the outgoing light angle is changed. Alphabet small letters a, b, c, d, e, f, g, and h of the irregularly reflected light 118 are internally reflected as irregularly reflected light 118 having different outgoing light angles after the incident light 114 enters the light-transmitting ceramic particles.

  The specific embodiments made in the section of the detailed description of the invention are merely to clarify the technical contents of the present invention, and should not be construed in a narrow sense by limiting only to such specific examples. Absent. It goes without saying that it is within the protection scope of the present invention that those skilled in the art can make various modifications and changes without departing from the concept and principle of the present invention.

DESCRIPTION OF SYMBOLS 10 LED chip 11 Wire bond 12 Sapphire ceramic substrate 14 Phosphor layer 16 Blue light leaks outside 18 LED light source 20 Wide light distribution type LED light bar 22 having a phosphor layer Tube 23 with one end opened Inner tube wall 24 Electrical Connection Line 26 Plug 28 Main Ceramic Particle 30 Contact between Particles and Adjacent Particles 32 Gap Filling Ceramic Particle 33 Ceramic Particle Fragment 34 Electrical Connection Line 36 Plug 38 Tube 40 Opened at Both Ends Inner Tube Wall 42 Main Ceramic Particle 44 Ceramic particle 46 for gap filling Ceramic particle fragment 48 Contact between particle and adjacent particle 50 Wide light distribution type LED light bar 52 having no phosphor layer LED light source 54 Tube 56 having one end opened 56 Plug 58 Electrical connection line 60 Inner tube Wall 62 Main ceramic particles 64 Ceramic particles 66 for gap filling Ramic particle fragment 68 Contact between particle and adjacent particle 70 Semicircular arc cover 72 Outer arc wall 74 Solid semicircular rod 75 Outer circular wall 76 Plug 77 Electrical connection line 78 Inner wall 80 Main ceramic particle 82 Ceramic particle 84 for gap filling Ceramic Particle Debris 85 Contact between Particles and Adjacent Particles 86 Die Bond Surface 88 Wide Light Distribution Type LED Light Bar 90 Widening Substrate and No Phosphor Layer on Die Bond Surface 90 Substrate Outer Surface 92 Ceramic Substrate 94 Die Bond Surface 96 Inner Groove Wall 98 Half Circular groove cover 100 Outer surface 102 Main ceramic particle 104 Ceramic particle for filling gap 106 Ceramic particle fragment 108 Contact between particle and adjacent particle 110 Plug 112 Electrical connection line 114 Incident light 116 Random refraction light 118 Diffuse reflection light

Claims (10)

  Wide light distribution type straight tube LED lamp, the wide light distribution type straight tube LED lamp includes a tube, the tube is open at both ends or one end, and has an LED light source in the tube, The LED light source includes at least two electrical connection lines, and the two electrical connection lines are each pulled out from openings at both ends of the tube and connected to the tube, or the two electrical connection lines are connected together. The tube is pulled out from one end opening of the tube and connected to the tube, and both ends of the tube or one end of the tube is closed with a plug, the inner tube wall of the tube and the LED A diffuse light transmissive ceramic particulate material is filled between the light sources. The particles of the diffuse light transmissive ceramic particle material are in contact with adjacent particles, and the porosity of the diffuse light transmissive ceramic particle material is less than 50%, and the diffuse light transmissive ceramic particle material is a primary ceramic particle. The volume-equivalent particle size of the diffuse light-transmitting ceramic particle material is greater than 0.1 mm for each of the main ceramic particles and 0 for the gap-filling ceramic particles. .05 mm and less than 0.1 mm, the ceramic particle debris is less than 0.05 mm, the volume fraction of the diffuse light transmissive ceramic particle material is more than 60% of the main ceramic particles, and the gap Wide light distribution tie characterized in that ceramic particles for filling are less than 40%, and fragments of ceramic particles are less than 20%. Straight-tube LED lamp.   The LED light source includes at least one wide light distribution type LED light bar, the wide light distribution type LED light bar has a plurality of LED chips, and the plurality of LED chips have a blue light LED chip and another color. The wide light distribution type straight tube LED lamp according to claim 1, further comprising:   The wide light distribution type straight tube LED lamp according to claim 1, wherein the tube is a transparent tube or a color tube.   2. The wide light distribution type straight tube LED lamp according to claim 1, wherein the material of the bulb is a plastic material, a glass material, or a ceramic material.   The glass material of the tube is made of quartz glass, sodium glass, calcium glass, potassium glass, lead glass, boron glass, or any combination of two or more kinds of glass materials. 5. The wide light distribution type straight tube LED lamp according to claim 4, wherein the glass material is a glass material in which different metal oxides or non-metal oxides are mixed.   The wide light distribution type straight tube LED lamp according to claim 4, wherein the ceramic material of the tube is single crystal aluminum oxide or polycrystalline aluminum oxide.   The wide light distribution type straight tube LED lamp according to claim 1, wherein the light-transmitting ceramic particle material is transparent particles or colored particles.   2. The wide light distribution type straight tube LED lamp according to claim 1, wherein the appearance shape of the particles of the light-transmitting ceramic particle material is regular shaped particles or irregular shaped particles.   2. The wide light distribution type straight tube LED lamp according to claim 1, wherein the light transmissive ceramic particle material is ceramic particles of single crystal aluminum oxide or polycrystalline aluminum oxide.   The light-transmitting ceramic particle material is glass particles, and the glass particles are mixed with two or more of quartz glass particles, sodium glass particles, calcium glass particles, potassium glass particles, lead glass particles, boron glass particles, or any combination. 2. The wide light distribution type straight tube LED lamp according to claim 1, wherein the glass particles are glass particles mixed with two or more different metal oxides or non-metal oxides. .

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