CN201764419U - LED lights and reflectors therein - Google Patents

Abstract

The utility model relates to a LED lamp and a reflecting cup therein, which is a reflecting cup for an illumination light source, comprising a cup body and a cup top, wherein the cup top is provided with an opening for leading the light source to extend into the reflecting cup from the hole, and the bottom of the reflecting cup is provided with an opening for leading the light emitted by the light source to be emitted; it is characterized in that a plurality of pits or bulges with radian are arranged on the cup body. The cup body of the light reflecting cup is provided with a plurality of check grains which are arranged in rows and columns, and each check grain is provided with a convex or concave cambered surface. The cambered surface can be in the shape of a spherical surface, a cylindrical surface or a conical surface. The arc surface has the following curvature: the curvature of the corrugations is calculated from the linear dimension A-B of the sides of the corrugations, and the height D-C of the highest point of curvature is proportionally calculated to be D-C equal to 0.02 to 0.1, especially 0.02 to 0.04 . The utility model also provides a LED reflector lamp who contains above-mentioned anti-light cup.

Description

LED lights and reflectors therein

technical field

The utility model generally relates to a lighting fixture, in particular to a light-emitting diode (LED) lamp and a reflective cup used therein. the

Background technique

LED lights refer to lighting products that use LED (Light-emitting Diode, light-emitting diode) technology as the main light source. LED is a solid-state semiconductor component, and different types of LEDs can emit light of various colors and different wavelengths. A new development in recent years is to coat blue LEDs with phosphor powder to convert blue LEDs into white LED products. The bulb of the LED lamp is small in size and light in weight, and is encapsulated with epoxy resin, which can withstand high-strength mechanical shock and vibration, is not easy to break, and has a long brightness decay period, so its service life can be as long as 50,000-100,000 hours. More than about 1000 hours of traditional tungsten bulbs and about 10,000 hours of fluorescent tubes. Since the service life of LED lamps can reach 5 to 10 years, not only can the cost of lamp replacement be greatly reduced, but also because of the characteristic of driving light with a very small current, under the same lighting effect, the power consumption is only One-half of fluorescent tubes, so LED lights also have the advantages of saving electricity and energy. the

At present, most of the light sources used in bulb-type LED lamps are high-power LEDs and AC LEDs in single crystal and polycrystalline packages. High-power LEDs packaged in single crystals are generally used in lighting products with concentrated light sources and strong directivity, such as MR16 and LED projection lamps. The LED bulbs that replace energy-saving bulbs above 10W use high-power LEDs packaged with multi-chips as light sources. the

In addition to using LEDs as light-emitting elements, the structure of LED lighting fixtures is similar to that of reflective energy-saving lamps. Generally speaking, LED lighting fixtures include: LED light boards, which contain LED chip packages, phosphor layers, etc.; housings; circuit parts that supply power to LED chips; reflector cups, radiators, etc. Fig. 1A shows a perspective view of a prior art LED reflector lamp. Figure 1B shows a bottom view of a prior art LED reflector lamp. Wherein the LED light-emitting element is located above the sign at the bottom of the LED light tube. The LED chip emits light after being powered on, and the light is transmitted to the phosphor powder covered on the LED chip or package, and the phosphor powder is excited to emit white light or light of a predetermined color. In this product, the light is emitted from the two sides of the upper part of the sign in Figure 1A, and is emitted forward after being reflected by the reflective cup. the

However, when the LED reflector lamp of the prior art is in use, the light spot (light and shadow area) projected by the reflector cup will appear a partially ring-shaped yellow area, which presents an uneven luminous effect, making the light output quality of the LED lamp tube Poor, affecting visual effect and application occasions. the

Utility model content

One purpose of the present utility model is to provide an LED reflector lamp with uniform light spots. Another object of the present utility model is to provide a reflective cup capable of reflecting in an LED reflector lamp to form a light-emitting area. the

In order to solve the above problems, the inventors adopted a curved grid reflective cup to realize an LED reflector lamp with a uniform light spot. the

According to one aspect of the present invention, there is provided a reflective cup for illuminating light sources, which includes a cup body and a cup top, wherein the top of the cup is provided with an opening so that the light source can extend into the reflective cup through the hole, and the bottom of the reflective cup It has an opening for emitting the light emitted by the light source; it is characterized in that the cup body is provided with a plurality of concaves or protrusions with radians, and the radians are different from the contour radians of the surface of the reflective cup. the

The shape of the cup body can be a rotationally symmetrical paraboloid or a hyperboloid, or other suitable shapes, such as spherical, terraced, cuboid, etc., or a compound curved surface, or even any shape. Described cup body can also be divided into a plurality of parts, to accommodate other parts, or to facilitate manufacturing or installation. the

The cup body of the reflective cup can be provided with a plurality of lattice patterns arranged in rows and columns, and each lattice pattern has a convex or concave arc surface. Preferably, the radian is designed as follows: the radian on the grid is calculated by the linear dimension of A-B, the dimension A-B of the side of the grid is about 1 mm to 10 mm, and the height of the highest point D-C of the radian of ADB is about 0.02 to 1 mm, Calculated in proportion, D-C is equal to 0.02 (A-B) to 0.1 (A-B), preferably the height of D-C is 0.02 to 0.4 mm, that is, D-C is equal to 0.02 (A-B) to 0.04 (A-B). the

The radian size of the protruding radian needs to meet the following requirements. The height of the radian is 0.02 to 0.1 times the size of the bottom of the radian, especially 0.02 to 0.04 times, that is, D-C is equal to 0.02 to 0.1 (A-B), preferably, 0.02 to 0.04 ( A-B). If the arc exceeds 0.1 times, the light intensity will be affected, but the light source can still be evenly distributed. the

The reflector cup can be used for LED reflector lamps, or for other types of reflector lamps, such as reflective energy-saving lamps, fluorescent lamps, incandescent lamps, etc., or even for all types of lighting sources. the

Another aspect of the utility model provides an LED reflector lamp, including a housing, an LED lamp board located in the housing as a light source and a circuit part for supplying power to the LED; A heat sink for the light board to dissipate heat, the reflector cup reflects the light emitted by the LED lamp board outward to form light output; it is characterized in that the reflector cup is the above-mentioned reflector cup. the

Wherein, the LED lamp board includes LED chip packaging and a fluorescent powder layer coated on the surface. Preferably, the LED light board contains a plurality of LED chips arranged in an array. The chips of the plurality of LEDs may be formed on one semiconductor substrate, or may be formed by interconnecting different semiconductor substrates. the

According to the reflection cup and the LED reflection lamp of the utility model, uniform light spots can be obtained, and at the same time, there is no adverse effect on the light intensity. the

Description of drawings

Fig. 1A is a perspective view of a prior art LED reflector lamp. the

Figure 1B is a bottom view of a prior art LED reflector lamp, showing the reflector cup therein. the

Fig. 1C is a schematic diagram of a plurality of LED chip arrays of an LED lamp board in an LED reflector lamp. the

Fig. 2 shows the light spot of the prior art LED reflector lamp. the

Fig. 3 is a perspective view of the LED reflector lamp of the present invention. the

Fig. 4 is the luminous light spot of the LED lamp of the present invention. the

Fig. 5 is a partial comparison diagram between the LED lamp of the present invention and the reflective cup of the prior art. the

Fig. 6 is a schematic diagram for calculating the arc of the reflector of the LED lamp of the present invention. the

Detailed ways

The scheme of the utility model will be described below with reference to the accompanying drawings with a light board containing a plurality of LED chips and an LED reflector lamp with a lattice reflective cup. the

The inventor of the present utility model has carried out in-depth and meticulous research and analysis on the LED reflector lamp of the prior art, and then found that the yellow ring-shaped area is mainly formed by the LED lamp in the light spot of the LED reflector lamp of the above prior art. boards formed by multi-chip arrays. the

Fig. 1C is a schematic diagram of a multi-chip LED array in an LED lamp panel of an LED reflector lamp. In Figure 1C, the largest box represents the LED chip substrate; the small rectangular frame represents the LED chip, and there are 3×10 LED chips arranged in the figure. These LED chips can be located on a single crystal substrate, or can be composed of multiple Composed of small chip arrays. There is a large distance between the rows of chips, as shown by the two vertical rectangles in FIG. 1C ; while the distance between the columns is relatively small. the

The reflector cup in the prior art LED reflector lamp is a smooth parabolic or hyperboloid shape, which is similar to the reflector cup in reflective fluorescent lamps or energy-saving lamps, but is divided into two petals to sandwich the LED lamp board therein. In the LED reflector lamp, there are non-luminous areas between the rows of LEDs in the LED chip array, and they will also produce non-luminous or weakly luminous areas of similar shape in the phosphor. Then these non-luminous places are reflected and projected by the reflector, and the yellow dark area shown in Figure 2 will be formed in the light spot of the LED lamp, thus producing uneven illumination in the light spot of the LED reflector lamp. the

In order to solve the above problems, the utility model provides a reflective cup for illuminating light sources, which includes a cup body and a cup top, wherein the top of the cup is provided with an opening to allow the light source to extend into the reflective cup through the hole, and the reflective cup There is an opening at the bottom for emitting the light from the light source; it is characterized in that a plurality of curved pits or protrusions are arranged on the cup body. the

The shape of the cup body can be a rotationally symmetrical paraboloid or a hyperboloid, or other suitable shapes, such as spherical, terraced, cuboid, etc., or a compound curved surface, or even any shape. The cup body can also be divided into multiple parts to accommodate other components, or to facilitate manufacture or installation. the

As shown in Figure 3, the grid pattern in the reflector cup designed in the figure will have a protruding radian, so that the reflected light can be evenly distributed, so that the light spot (light and shadow area) projected by the reflector cup becomes uniform and does not A yellow area will appear and the light intensity will not be affected. the

The design of the reflector is to have a convex arc on each grid. The partially enlarged view of Fig. 5 shows a part of the reflective cup, the left side of Fig. 5 is the surface of the reflective cup of the prior art, and the right side is the surface of the reflective cup of the present invention. It can be seen from FIG. 5 that the surface of the reflective cup in the prior art is smooth, and the grid pattern is directly designed. The reflector cup in the prior art is made by spinning process, and the grid pattern is made because the spinning mold has a grid pattern. Since the surface of the reflector is a curved surface such as a parabola or a hyperboloid, the four sides of each grid are also curved. The edge of the grid from the top of the cup to the bottom of the cup is a gradually diverging parabola or hyperbola, while the edge of the grid parallel to the bottom of the cup is a parallel circle. In the reflector of the prior art, the surfaces of each lattice form a smooth paraboloid or a hyperboloid together. the

The reflective cup of the utility model is provided with a plurality of lattice patterns arranged in rows and columns, and each lattice pattern is formed with a raised arc surface (cylindrical surface or spherical surface), and the arc surface has a radian. Looking from the bottom of the LED reflector lamp to the reflective cup, each grid pattern of the reflective cup forms a small concave mirror, that is, the arc surface is convex inward. In the reflective cup of the present utility model, the convex arc surface in each grid pattern makes the overall surface of the reflective cup no longer a smooth paraboloid or hyperboloid, but forms a concave-convex pattern, but the reflective cup as a whole still has a paraboloid or a double curved surface. The profile of the surface. Alternatively, the reflective cup of the present utility model can be understood as, after forming the reflective cup of the prior art, the curved surface in each lattice pattern in the reflective cup is raised inwardly or outwardly to form an arc surface (cylindrical surface or spherical surface) , the curvature of the curved surface (cylindrical or spherical) is different from the paraboloid or hyperboloid that forms the surface profile of the reflective cup. the

The following takes a reflective cup in the shape of a paraboloid as an example to explain the design of the curvature of the grid arc surface in the reflective cup. the

Fig. 6 shows a partially enlarged schematic view of the reflective cup, wherein the reflective cup is placed upside down, the bottom of the cup is located at the upper part of the figure, and the top of the cup is located at the lower part of the figure. The horizontal direction of the drawing is parallel to the bottom of the cup, and each square represents a lattice pattern. The upper and lower sides of each check are parallel to the bottom edge of the cup, and the sides of the check are defined by a parabola extending from the top to the bottom of the cup. Each lattice pattern has vertices A, B and an arc surface ADB, and each vertices A, B are located on the paraboloid shape of the reflective cup. the

In Figure 6, the distance of the side straight line ACB in each grid is represented by A-B. According to the size of the reflector cup, the dimension A-B of the side of the grid is about 1mm to 10mm, and the highest point of the radian ADB is D, and D-C is The height of the arc surface, the height of D-C is about 0.02 to 1mm, and the proportional calculation of D-C is equal to 0.02 (A-B) to 0.1 (A-B), especially the height of D-C is about 0.02 to 0.4mm, that is, D-C is equal to 0.02 to 0.04 (A-B ). It should be noted that the straight line ACB is a design line used to calculate radians, and in the actual reflector product, there is no edge straight line ACB in the check pattern. The height of the arc is also different in reflectors of different sizes. the

The grid radian of the above-mentioned protruding arc surface needs to meet the size requirements, and the highest arc point is 0.02 to 0.1 times the bottom of the arc, preferably 0.02 to 0.04 times, that is, D-C is equal to 0.02 to 0.04 (A-B). If the arc exceeds 0.1 times, the light intensity will be affected, but the light source can still be evenly distributed. the

The shape of the above-mentioned convex arc surface may be a cylindrical surface, a spherical surface or a conical surface, or other suitable current conditions. This can be determined according to the light-gathering requirements and/or processing technology of the LED reflector lamp. For spherical or conical arcs, point C needs to be located in the center of the plane where the four vertices of the grid are located, and point D is located on the vertical line of the plane where the four vertices of the grid are located and the vertical line passes through point C. According to the four vertices of the reflective cup pattern and the height D-C of the arc surface, and at the same time according to the shape of the arc surface, and according to the geometric principle, the entire shape of the arc surface can be determined. the

Another alternative is that the arc surface can also protrude outward, that is, form a convex mirror viewed from the bottom of the reflective cup, which can also achieve the effect of the present invention. the

The shape of the reflector is not limited to the parabolic shape. On the reflector with the hyperboloid shape or other suitable shapes, the grid pattern and the convex/concave arc can also be designed in the same way to eliminate the shadow in the reflected light spot Or yellow light area, forming a uniform spot. the

The reflector cup can be used for LED reflector lamps, or for other types of reflector lamps, such as reflective energy-saving lamps, fluorescent lamps, incandescent lamps, etc., or even for all types of lighting sources. the

Therefore, another aspect of the present utility model provides an LED reflector lamp, including a housing, an LED lamp board located in the housing as a light source and a circuit part for supplying power to the LED; a reflective cup solid on the housing and used for The heat sink for dissipating heat from the LED light board, the reflective cup reflects the light emitted by the LED light board outward to form light output; it is characterized in that the reflective cup is the above-mentioned reflective cup. the

Wherein, the LED lamp board contains an LED chip package and a phosphor layer coated on the surface. Preferably, the LED light board contains a plurality of LED chips arranged in an array. The chips of the plurality of LEDs may be formed on one semiconductor substrate, or may be formed by interconnecting different semiconductor substrates. the

Fig. 4 shows the light spots of the LED reflector lamp of the present invention. Among them, the above-mentioned reflective cup with curved surface is used, and the light emitted by the LED light board is emitted from the reflector lamp after being reflected by the reflective cup. The light spot (light and shadow area) projected by the reflective cup is very uniform, because the grid The curved surface or radian of the reflector lamp can evenly distribute the light emitted by the reflector lamp, and the yellow area in the prior art will not appear, and the output light intensity of the reflector lamp will not be affected. the

The reflective cup used for illuminating light sources and the LED lamp containing the reflective cup of the present utility model are described above with preferred embodiments. Those skilled in the art can make various improvements and/or modifications to the utility model according to the teaching in the specification, and these improvements and/or modifications should all be included in the scope of the claims of the utility model. the

Claims (9)

1. the reflector that LED light lamp uses comprises glass body and cup top, and wherein the cup top is provided with perforate so that light source stretches into the reflector from this hole, and the top of reflector has opening, and the light that is used to light source is sent penetrates; It is characterized in that described cup is provided with a plurality of pit or projectioies that radian is arranged on one's body, this radian is different with the profile radian on reflector surface.

2. according to the reflector of claim 1, it is characterized in that the cup of described reflector is provided with a plurality of checks of arranging by ranks on one's body, on each check, all form and protrude or recessed cambered surface.

3. according to the reflector of claim 2, it is characterized in that the lonely degree of described cambered surface is as follows: the radian on the check is calculated by the straight-line dimension A-B of check side, and the height D-C pro rata of radian peak is that D-C equals 0.02 (A-B) to 0.1 (A-B).

4. according to the reflector of claim 3, it is characterized in that D-C equals 0.02 (A-B) to 0.04 (A-B).

5. according to the reflector of claim 3 or 4, the size A-B that it is characterized in that the check side is 1mm to 10mm.

6. according to the reflector of claim 3 or 4, the shape that it is characterized in that described cambered surface is sphere shape, cylinder shape or cone-shaped.

7. according to the reflector of one of claim 1-4, it is characterized in that the shape of described cup body is rotational symmetric parabola or hyperboloid shape.

8. a LED light lamp comprises housing, is arranged in housing as the light emitting diode lamp plate of light source and the circuit part of powering to light emitting diode; The light that the reflector of solid on housing and be used for radiator to light emitting diode lamp plate heat radiation, described reflector send the light emitting diode lamp plate forms light output to external reflectance; It is characterized in that described reflector is according to the described reflector of one of claim 1-7.

9. LED light lamp according to claim 8 is characterized in that described light emitting diode lamp plate contains by the chip of a plurality of light emitting diodes of arrayed and scribble phosphor powder layer on the surface of light emitting diode lamp plate.

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