CN101749650A - LED (light-emitting diode) lamp tube - Google Patents

Abstract

The invention relates to an LED (light-emitting diode) lamp tube which is mainly characterized in that a lamp tube body is internally provided with a light guide plate, at least one side of the light guide plate is provided with a plurality of LEDs as light sources, and the LEDs are electrically connected with conductive terminals arranged on both ends of the lamp tube body; and the other surface of the light guide plate, which corresponds to a light emerging surface, can be further provided with a reflector plate, each LED projects light rays into the light guide plate, and even partial light rays are reflected out of the light guide plate by the reflector plate so as to ensure that the lamp tube body finally achieves a uniform luminescence effect.

Description

LED light tube

technical field

The invention relates to an LED lamp tube, in particular to a structure that can make the light emitted by the lamp tube more uniform.

Background technique

Based on the characteristics of power saving and long service life, coupled with the improvement of luminous brightness technology, the application of LED (Light Emitting Diode) in lighting applications has become a current trend and a trend in the future. Due to the small size of the LED, the luminous lumens of a single LED cannot be compared with ordinary tungsten bulbs, fluorescent lamps or existing lighting fixtures. Therefore, the current LED lighting fixtures are integrated with multiple LEDs. Practical lighting brightness is produced by concentrated light emission.

Collecting a plurality of LEDs in a specific area to concentrate and emit light can achieve the same lighting effect as ordinary lamps, but its disadvantage is that the LED lamp contains multiple "bright spots" (each LED forms a bright spot) within a specific area. It is easy to produce a visual effect that the light is not soft enough.

Taking the currently commercially available LED lamp in the form of a fluorescent lamp as shown in Figure 6, its structure is to arrange a plurality of LEDs 3 inside the light-transmitting lamp body 1, and these LEDs 3 are arranged on a circuit board. The board is electrically connected to the conductive terminals 11 located at both ends of the lamp body 1; the lamp body 1 can be installed in the existing fluorescent lamp holder like a traditional fluorescent lamp, and it is intended to replace the traditional fluorescent lamp due to the long service life of the LED. . However, when these LEDs 3 are emitting light, the user can see the bright spots of each LED from the outside of the lamp body 1, so that the visual perception is affected.

Contents of the invention

The technical problem to be solved by the present invention is to provide an LED lamp tube, aiming at solving the above problems.

In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

The present invention includes: a light tube body, which is a light-transmitting tube body, and its opposite ends are respectively provided with conductive terminals; it also includes: at least one light guide plate, with a first side and a second side opposite to each other; The light plate is set in the lamp body; a plurality of LEDs are set on at least one side of the light guide plate, and these LEDs are electrically connected with the conductive terminals, and can project light into the light guide plate.

Compared with the prior art, the beneficial effect of the present invention is that while using the LED light source, the visual uniformity of the lighting fixture will not be damaged by the bright spot caused by a single LED, so that the light source is softer and more beautiful.

Description of drawings

Fig. 1 is a front plan sectional view showing a first embodiment of the present invention.

FIG. 1A shows an embodiment of the present invention in which a plurality of LEDs are arranged obliquely on one side of a light guide plate.

Fig. 2 is a front plan sectional view showing a second embodiment of the present invention.

Fig. 3 is a front plan sectional view showing a third embodiment of the present invention.

Fig. 4 is a front plan sectional view showing a fourth embodiment of the present invention.

5 is a side plan cross-sectional view showing an embodiment of the present invention in which a reflective sheet is arranged on the light-emitting surface of the light guide plate.

FIG. 6 is a schematic plan view showing the structure of an LED lamp in the prior art.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

The main purpose of the present invention is to solve the problem of the current LED lamp tube, which arranges a plurality of LEDs in the lamp tube, and makes the LED directly emit light for illumination, so that bright spots will be produced on the surface of the lamp tube, making the user feel that the light is not soft, and the visual perception Poor question.

The feature of the present invention is to conduct the LED light source in an indirect way, so that while using the LED light source, the visual uniformity of the lighting fixture will not be damaged by the bright spot caused by a single LED, so that the light source is softer , Beautiful.

The technical means of the present invention is to install a light guide plate inside a lamp body, and the two ends of the lamp body are provided with conductive terminals, and at least one side of the light guide plate is provided with a plurality of LEDs as light sources, and these LEDs are connected to the The conductive terminals at both ends of the lamp body are electrically connected; the light guide plate can be further provided with a reflective sheet on the other side of the light-emitting surface, and the LED projects light into the light guide plate, and even part of the light is reflected out of the light guide plate by the reflective sheet, and finally Let the whole lamp body present a uniform luminous effect.

In the present invention, LEDs can be arranged on one side or both sides of the light guide plate. If LEDs are arranged on both sides, the arrangement of the LEDs on both sides of the light guide plate can be mutually symmetrical or interlaced; The light projection direction of the LEDs forms an included angle with the projection direction of the LED light on the opposite side; even a plurality of obliquely arranged LEDs can be arranged on only one side of the light guide plate, and the same uniform brightness effect can be achieved.

Compared with the existing LED tubes, each LED can be clearly seen from the outside of the tube, resulting in visual incongruity and insufficient light softness; the present invention is indirectly transmitted by light The method also achieves the purpose of using LED light source lighting, but the softness of the overall lighting is improved, and it can better cooperate with the surrounding environment, which is a progressive design.

Referring to Fig. 1, the preferred embodiment of the LED lamp provided by the present invention includes: a lamp body 1, a light guide plate 2 and a plurality of LEDs 3; wherein, the lamp body 1 is light-transmittable material, which can be glass, plastic, acrylic, ..., etc., and the opposite ends of the lamp body 1 are respectively provided with conductive terminals 11, to form a shape similar to the commonly available fluorescent tubes.

The light guide plate 2 is a board made of optical materials with high light-transmitting properties, and it is set in the lamp body 1; preferably, the light guide plate 2 is set in response to the length of the lamp body 1 In order to be able to be accommodated in the long shape of the lamp body, the light guide plate 2 can be an integrally formed plate body, or can be formed by connecting and combining a plurality of shorter plate bodies; the light guide plate 2 has two largest areas side, wherein the first side is used as a light-emitting surface, and the opposite second side is combined with a reflective sheet 22 that can reflect light; in addition, an optical structure 21 for reflecting and refracting light can also be provided on the second side; the optical The structure 21 may be formed by a plurality of protruding points protruding from the second side, or may be formed by a plurality of concave points lower than the second side.

The LEDs 3 can be arranged on one side of the light guide plate 2, or on opposite sides of the light guide plate 2, and electrically connect the LEDs 3 to the conductive terminals 11 at both ends of the lamp body 1; The tube body 1 is installed on the lamp holder in the usual way of using a fluorescent lamp. After the conductive terminal 11 is inserted into the hole of the lamp holder to be electrically connected and energized, the light emitted by the LED 3 can be projected into the light guide plate 2 (as shown in FIG. 5 ). Reflected by the reflector 22 and assisted by the optical structure 21 for reflection and refraction, the brightness of the light guide plate can be improved, so that the entire lamp tube presents a lighting effect similar to that of a general fluorescent lamp.

The layout of the LED 3 of the present invention on the light guide plate 2 can be arranged on one side of the light guide plate 2 as shown in Figure 1, and the direction of light projection is directly perpendicular to the other opposite side; or as shown in Figure 1A, The plurality of LEDs 3 arranged on one side of the light guide plate 2 are arranged in a state of being inclined at an appropriate angle, so that the projection angle of the light has an included angle with the other opposite side of the light guide plate; symmetrically arranged on opposite sides of the light guide plate 2; or as shown in FIG. There is an included angle between the light projection direction of LED3a and the light projection direction of LED3 on the opposite side, so as to make the coverage of light projection more even.

The above descriptions are only preferred embodiments for explaining the present invention, and are not intended to limit the present invention in any form. All relevant modifications or changes made under the same spirit should still be included in this document. within the scope of protection of the invention.

Claims (10)

1. A LED light tube, comprising: a light tube body, which is a light-transmitting tube body, and its opposite ends are respectively provided with conductive terminals; it is characterized in that it also includes: at least one light guide plate, with a relative first A side surface and a second side surface; the light guide plate is set in the lamp body; a plurality of LEDs are set on at least one side of the light guide plate, and the LEDs are electrically connected to the conductive terminals. 2. The LED light tube according to claim 1, wherein the first side of the light guide plate is a light-emitting surface, and the opposite second side is provided with a reflective sheet. 3. The LED light tube according to claim 1 or 2, wherein a plurality of LEDs are provided on opposite sides of the light guide plate. 4. The LED light tube according to claim 1 or 2, characterized in that: the arrangement of the LEDs on both sides of the light guide plate is symmetrical to each other. 5. The LED lamp tube according to claim 1 or 2, characterized in that: the LEDs on both sides of the light guide plate are arranged in a staggered manner. 6. The LED light tube according to claim 1 or 2, characterized in that: the projection direction of the LED light on one side of the light guide plate has an included angle with the projection direction of the LED light on the opposite side. 7. The LED lamp tube according to claim 1 or 2, characterized in that: a plurality of inclined LEDs are arranged on one side of the light guide plate, and the light projection direction of these LEDs is opposite to the other side of the light guide plate. an angle. 8. The LED light tube according to claim 1, characterized in that: the second side of the light guide plate is provided with an optical structure for reflecting and refracting light. 9. The LED light tube according to claim 8, wherein the optical structure is a plurality of protruding points protruding from the second side surface. 10. The LED light tube according to claim 8, wherein the optical structure is a plurality of concave points lower than the second side surface.

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