CN101725920B - Reflective LED Luminaires - Google Patents

Abstract

A reflective light emitting diode lamp, comprising: a lamp tube, at least one substrate and at least one LED. The lamp tube is a strip-shaped circular body and comprises a light reflecting shell and a light transmitting cover. The reflecting shell is provided with a reflecting surface at the inner side. The substrates are arranged in the lamp tube. The light emitting diodes are arranged on the substrate, the light emitting direction of the light emitting diodes faces to the light reflecting shell, and the light rays are reflected by the light reflecting surface of the light reflecting shell and then emitted out of the light transmitting cover. Therefore, the point light source characteristics of the light emitting diodes can be eliminated, and the phenomena of uneven light and ghost caused by the point light sources are eliminated. In addition, because the characteristic of a point light source is eliminated before the light is emitted from the light-transmitting cover, the light mixing effect is better than that of the common LED lamp.

Description

Reflective LED Luminaires

technical field

The invention relates to a light-emitting diode lamp, in particular to a reflective light-emitting diode lamp.

Background technique

Fluorescent tubes can be said to be a very important invention of indoor lighting. Most of the nighttime indoor lighting in the world now uses fluorescent tubes. However, the disadvantage of fluorescent tubes is that they consume a lot of power and need to generate high voltage for operation. In addition, mercury in fluorescent tubes has been criticized for polluting the earth's environment. Therefore, the search for new lighting devices has aroused great interest among scientists and business circles.

The white light-emitting diode, which began to be developed in the late 20th century, brought a ray of light for lighting. In 1996, on the basis of GaN blue light-emitting diodes, Japan's Nichia Corporation developed a blue light-emitting diode to excite yttrium aluminum garnet (YAG) phosphors to produce yellow fluorescence. The resulting yellow fluorescence is then mixed with blue light to produce white light (blue light-emitting diodes combined with YAG phosphor powder), which opens the prelude to light-emitting diodes entering the lighting market. Compared with traditional fluorescent tubes, white light-emitting diodes have many advantages, such as small size (multiple pieces, multiple combinations), low calorific value (less heat radiation), low power consumption (low voltage, low current start), long life Long (more than 100,000 hours), fast response (high-frequency operation), environmental protection (shock resistance, impact resistance, not easy to break, waste can be recycled, no pollution), flat packaging and easy development into thin and short products. It was once calculated that if all fluorescent tubes in Taiwan were replaced with white light-emitting diode devices, the electricity equivalent to a nuclear power plant might be saved a year. In addition, the light-emitting diodes use solid inorganic substances and inorganic phosphors, which solves the problem of mercury pollution in fluorescent tubes in the past. Therefore, white light-emitting diodes are the best choice for human future lighting equipment, and are also the goal of joint efforts of all advanced countries in the world.

However, a problem occurs when using conventional light-emitting diodes as light-emitting lighting equipment. That is, the light-emitting diode is a point light source, so uneven light will appear under short-distance irradiation, resulting in ghost images. To illustrate the disadvantages of the above-mentioned conventional LED lamps, please refer to FIG. 1 and FIG. 2 at the same time: FIG. 1 is a top view of a conventional LED lamp; FIG. 2 is a cross-sectional view of a conventional LED lamp. The existing LED lamp includes: a lamp tube 10A, a plurality of LEDs 12A and a substrate 14A. The substrate 14A is disposed inside the lamp tube 10 . The LEDs 12A are mounted on the substrate 14A. The lamp tube 10A is a long and circular body. The substrate 14A is a printed circuit board, which drives the light emitting diodes 12A to emit light after cooperating with conventional circuit design and power supply (not shown). It can be seen from the figure that the light emitting diodes 12A are point light sources, which will cause uneven light and ghost images. In addition, if it is desired to mix light (that is, the light emitting diodes 12A include light emitting diodes with more than two light emitting colors), because it is a point light source, the light mixing process will need a considerable distance to complete, so as to show a uniform The color after mixing.

Contents of the invention

Therefore, an object of the present invention is to provide a reflective LED lamp, which improves the characteristics of the LED point light source, so as to reduce the phenomenon of uneven light and ghost images caused by the point light source.

Another object of the present invention is to provide a reflective LED lamp to improve the light mixing effect of conventional LED lamps.

To achieve the above object, the reflective light emitting diode lamp of the present invention comprises: a lamp tube, at least one substrate and at least one light emitting diode. The lamp tube is a long circular body and includes a reflective shell and a light-transmitting cover. The reflective casing and the transparent cover are respectively a long semicircular body. The reflective housing has a reflective surface on the inner side. The transparent cover is a light diffusion sheet. The base plates are arranged in the lamp tube. The light emitting diodes are installed on the substrates, and the light emitting direction faces the reflective housing, and the light is reflected by the reflective surface of the reflective housing and then emitted from the transparent cover.

The beneficial effect of the present invention is that these light emitting diodes, which were originally point light sources, can be transformed into line light sources by using reflection to make the characteristics of point light sources disappear. Light unevenness and ghosting caused by the light source. In addition, because the characteristics of the point light source are eliminated before the light is emitted from the translucent cover, the light mixing effect will be better than that of conventional LED lamps. The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

FIG. 1 is a top view of an existing light-emitting diode lamp;

Fig. 2 is a sectional view of an existing LED lamp;

Fig. 3 is a side view of a preferred embodiment of the reflective LED lamp of the present invention;

4 is a cross-sectional view of a preferred embodiment of the reflective LED lamp of the present invention;

FIG. 5 is a top view of a preferred embodiment of the reflective LED lamp of the present invention.

Among them, reference signs

10A lamp

12A LED

14A Substrate

10 lamps

12 LEDs

14 Substrate

16 Reflective housing

18 Translucent cover

Detailed ways

Please refer to FIG. 3 , which is a side view of a preferred embodiment of the reflective LED lamp of the present invention. Please refer to Fig. 4 and Fig. 5 at the same time: Fig. 4 is a sectional view of a preferred embodiment of the reflective LED lamp of the present invention (that is, the sectional view of Fig. 3); Fig. 5 is a sectional view of the reflective LED lamp of the present invention A top view of a preferred embodiment (ie, the top view of FIG. 3 ). The reflective LED lamp according to a preferred embodiment of the present invention includes: a lamp tube 10 , two substrates 14 and at least one LED 12 . The lamp tube 10 is an elongated circular body. The two substrates 14 are respectively disposed on one side and the opposite side of the inner wall of the lamp tube 10 . The light emitting diodes 12 are installed on the two substrates 14 , and the number is not limited, and the brightness of the light can be increased or decreased according to the required candle.

The lamp tube 10 includes a reflective shell 16 and a transparent cover 18 . The reflective casing 16 of the lamp tube 10 has a reflective surface inside for reflecting light. The transparent cover 18 of the lamp tube 10 is a light diffusion sheet, which can diffuse the emitted light and reduce the phenomenon of point light source. The reflective housing 16 of the lamp tube 10 and the translucent cover 18 of the lamp tube 10 are respectively a long semicircular body to form the lamp tube 10, but the reflective housing 16 and the translucent cover 18 can also be The transparent casing is integrally formed and formed by providing a reflective surface on the inner surface of the elongated semicircle corresponding to the reflective casing 16 . The two substrates 14 are printed circuit boards, which drive the light-emitting diodes 12 to emit light after cooperating with conventional circuit design and power supply (not shown). The light emitting direction of the light emitting diodes 12 faces the reflective housing 16 of the lamp tube 10 , and light is reflected from the light-transmitting cover 18 of the lamp tube 10 after being reflected by the reflective surface of the reflective housing 16 of the lamp tube 10 . shoot out. In this way, the light-emitting diodes 12 that were originally point light sources can disappear after reflection and become line light sources or surface light sources. Therefore, the light source will be close to the existing fluorescent lamp tubes, and greatly reduce the damage caused by point light sources. The phenomenon of uneven light and ghosting is caused. In addition, because the characteristics of the point light source have been eliminated before the light is emitted from the translucent cover 18 of the lamp tube 10, the effect of light mixing (that is, the light emitting diodes 12 include light emitting diodes with more than two kinds of light emitting colors) will be more effective than the general one. Some LED lamps are better.

In addition, the number of the substrate 14 is not limited to two, for example, it can be one, and it is arranged on one side of the inner wall of the lamp tube 10, or even arranged on the bottom of the light-transmitting cover 18 of the lamp tube 10, as long as these The light-emitting direction of the light-emitting diode 12 faces the reflective housing 16 of the lamp tube 10, so that the light is reflected by the reflective surface of the reflective housing 16 of the lamp tube 10 and then emitted from the light-transmitting cover 18 of the lamp tube 10. Can.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (3)

1. A reflective LED lamp, characterized in that it comprises: A light tube is a long circular body, including a reflective shell and a light-transmitting cover, the reflective shell has a reflective surface on the inside, the reflective shell and the light-transmitting cover are respectively a long semicircle shape; Two substrates are respectively arranged on one side and the opposite side of the junction of the light-reflecting shell and the light-transmitting cover on the inner wall of the lamp tube; and At least one light emitting diode is installed on the base plate and the light emitting direction faces the reflective housing, and the light is reflected by the reflective surface of the reflective housing and emitted from the transparent cover. 2. The reflective light-emitting diode lamp according to claim 1, wherein the light-transmitting cover is a light-diffusing sheet. 3. The reflective LED lamp according to claim 1, wherein the LEDs comprise LEDs of more than two colors.

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