TWI554718B - Led light tube with external light source - Google Patents

Description

Light source external LED tube

The invention relates to an LED lamp tube, in particular to a light source external LED tube.

The fluorescent tube has been invented since 1938 by General Electric (GE). Its structure has not changed. It is to seal the toxic mercury vapor into the glass tube and put it on high voltage to generate arc light.

Nowadays, with the application of LED light source, LED light bar is used as a light source to be packaged in a lamp tube to form an LED lamp tube to replace the conventional fluorescent lamp tube. However, since the LED light tube is in the light tube, on the one hand, the assembly of the LED light strip and the light tube is troublesome, it is difficult to realize automatic production, and the cost is difficult to reduce; on the other hand, the waste heat generated when the LED emits light is not easy. Dissipate, affecting the LED's service life and light efficiency.

Therefore, the technical problem to be solved by the present invention is to provide a light source external LED tube, which is convenient for forming automatic production and reducing manufacturing cost, and at the same time, the light diffusion effect of the LED light is good, and the waste heat generated by the LED is more easily distributed.

In order to achieve the above object, the technical solution of the present invention is: a light source external LED tube, comprising a lamp tube and an LED light source plate, the LED light source plate comprising an elongated substrate and a plurality of LEDs mounted on the elongated substrate The lamp tube has an elongated through hole in the axial direction, the elongated substrate is fixedly connected to the outer peripheral surface of the lamp tube, and the plurality of LED illuminators are located between the two sides of the elongated through hole.

Preferably, the tube is a circular glass tube, and the elongated through hole is at the top of the tube. Since the circular glass tube has better light transmittance, it is more favorable for the light emitted by the LED to be emitted to the outside. The long through hole is arranged on the top of the lamp tube, which is beneficial to improve the appearance of the product, and a diffusion film is arranged on the inner circumference of the lamp tube, so that the light output of the lamp tube is better and the light is softer.

Preferably, each of the LED illuminators is disposed adjacent to an outer circumferential surface of the tube. In this way, each LED illuminator is far away from the central axis of the lamp tube, increasing the path of the LED illuminator emitting light to the lamp tube, and also allowing the light emitted by the LED illuminator to be received everywhere in the inner peripheral surface of the lamp tube to improve light mixing. The effect is to further improve the uniformity of the light output of the LED tube.

Preferably, the width of the elongated through hole is smaller than the width of the elongated substrate, the width of the elongated substrate is smaller than the diameter of the tube, and the width of the elongated through hole is proportional to the diameter of the tube. It is 1/2 to 1/7.

Preferably, the elongated through hole has a width of 4.5 mm to 5.5 mm, and the elongated substrate has a width of 8 mm to 12 mm.

Preferably, the elongated substrate and the tube are fixed by an adhesive phase. This makes it easier to automate production.

Further, the lamp tube is provided with a connection plane on the outer peripheral surfaces of both sides of the elongated through hole, and the elongated substrate is fixedly connected to the connection plane by the double-sided tape. This method of fixing is relatively simple.

Further improved, the elongated substrate is bonded to the outer peripheral surface of the tube by at least one strip, and the elongated substrate is fixed to the tube. This type of attachment is also easy to automate production.

Further improved, the lamp tube forms two sides of the elongated through hole bent inwardly, and two protrusions extend on the outer peripheral surface of the two sides of the elongated through hole to form two figure-shaped card slots. The elongated substrate is snapped onto the two figure-shaped card slots to form a fixed connection with the lamp tube.

Such a snap-fit fastening method may preferably have a width of the elongated substrate of 8 mm to 9 mm.

In the present invention, since the substrate of the LED light source panel is fixed to the outer peripheral surface of the lamp tube, a plurality of LED illuminators are disposed between both side faces of the elongated through hole. Compared with the existing LED tube, the structure needs to package the LED light source board in the lamp tube, and the assembly is more convenient, which is convenient for automatic production by using equipment, and reduces manufacturing cost; and because the LED light source board is outside the lamp tube, the LED is generated. The emission of waste heat is better, which is beneficial to prolonging the service life and light effect of the LED; on the other hand, a plurality of LED illuminators are located between the two sides of the elongated through hole, which is more favorable for the light emitted by the LED to be incident on the tube. On the top, increase the angle of light to improve the diffusion of light.

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

Embodiment 1 and the first figure show a light source external LED tube, comprising a lamp tube 1 and an LED light source plate 2, the LED light source plate 2 comprising an elongated substrate 21 and a plurality of mounted on the elongated substrate 21. The LED illuminators 22 are uniformly distributed along the elongated substrate 21, and the tube 1 is opened with an elongated through hole 11 in the axial direction, and the elongated through hole 11 is located at the top of the tube 1. The elongated substrate 21 is fixed to the outer peripheral surface of both sides of the long through hole 11 of the bulb 1 by an adhesive 23, and a plurality of LED illuminators 22 are disposed between both side faces of the elongated through hole 11.

This arrangement structure places each of the LED illuminators 22 near the outer circumferential surface of the bulb 1. Thus, each of the LED illuminators 22 is away from the central axis of the lamp tube, increasing the path of the LED illuminator 22 to the light reaching the lamp tube 1, and also allowing the LED illuminant 22 to be emitted everywhere in the inner peripheral surface of the lamp tube 1. Light, improve the effect of light mixing, and further improve the uniformity of light output from LED tubes.

In order to further improve the light-emitting effect of the lamp tube, the lamp tube 1 is preferably a circular glass lamp tube, and a diffusion film 12 is plated on the inner circumferential surface of the lamp tube 1.

Preferably, the width of the elongated through hole 11 is smaller than the width of the elongated substrate 21, and the width of the elongated substrate 21 is smaller than the diameter of the tube 1, and the width of the elongated through hole 11 is preferable. The ratio of the diameter to the tube 1 is 1/2 to 1/7. In this way, the coordination of the entire LED tube is good, and the appearance quality of the product can be improved.

Further preferably, the elongated through hole 11 has a width of 5 mm, the elongated substrate 21 has a width of 12 mm, and the outer diameter of the tube 1 is Φ 24.8 mm. The elongated substrate 21 is selected from a PBC plate to facilitate the fabrication of the LED light source panel 2, thereby reducing manufacturing costs.

The second embodiment is different from the first embodiment in that the lamp tube 1 is provided with a connection plane 13 on the outer circumferential surfaces of the elongated through holes 11 , and the elongated substrate 21 passes through the double-sided tape. The strip 3 is fixedly connected to the connecting plane 13; preferably, the strip-shaped substrate 21 has a width of 8 mm.

The third embodiment and the third embodiment are different from the first embodiment in that the elongated substrate 21 is bonded by a plurality of strips 4 and attached to the outer peripheral surface of the bulb 1 to form the elongated substrate 21. It is fixed to the tube 1. Preferably, the elongated substrate 21 has a width of 8 mm.

The fourth embodiment and the fourth embodiment are different from the first embodiment in that the lamp tubes 1 are formed with the two side portions 111 of the elongated through holes 11 bent inwardly while being adjacent to the sides of the elongated through holes 11. Two protrusions 14 extending on the outer peripheral surface form two splayed card slots 15, and the elongated substrate 21 is snapped onto the two figure-shaped card slots 15 to form a fixed connection with the lamp tube 1;

Preferably, the elongated substrate 21 has a width of 8 mm; and the elongated through hole 11 has a width of 7.54 mm.

In view of the foregoing description of the embodiments, the operation and the use of the present invention and the effects of the present invention are fully understood, but the above described embodiments are merely preferred embodiments of the present invention, and the invention may not be limited thereto. Included within the scope of the present invention are the scope of the present invention.

1‧‧‧Light tube

11‧‧‧Large through holes

111‧‧‧ side

12‧‧‧Diffuser film

13‧‧‧ Connection plane

14‧‧‧ bump

15‧‧‧eight-shaped card slot

2‧‧‧LED light source board

21‧‧‧Large substrate

22‧‧‧LED illuminator

23‧‧‧Adhesive

3‧‧‧Double-sided strip

4‧‧‧Strips

[First Figure] is a cross-sectional structural view of a first embodiment of the present invention;

[Second figure] is a cross-sectional structural view of a second embodiment of the present invention;

[Third Figure] is a cross-sectional structural view of a third embodiment of the present invention;

[Fourth figure] is a cross-sectional structural view of a fourth embodiment of the present invention.

1‧‧‧Light tube

11‧‧‧Large through holes

12‧‧‧Diffuser film

2‧‧‧LED light source board

21‧‧‧Large substrate

22‧‧‧LED illuminator

23‧‧‧Adhesive

Claims (5)

A light source external LED tube comprises a lamp tube and an LED light source plate, wherein: the LED light source plate comprises an elongated substrate and a plurality of LED illuminators mounted on the elongated substrate, the lamp tube is axially opened a long strip-shaped through hole fixed to the outer peripheral surface of the lamp tube, wherein the plurality of LED illuminants are between the two sides of the elongated through hole; wherein the lamp tube is on both sides of the elongated through hole a connecting plane is disposed on the outer peripheral surface, and the elongated substrate is fixedly connected to the connecting plane by a double-sided tape, or at least one strip is bonded to the elongated substrate and attached to the outer peripheral surface of the lamp The elongated substrate is fixed to the tube. The light source external LED tube according to the first aspect of the invention, wherein the tube is a circular glass tube, the elongated through hole is at the top of the tube, and the inner circumference of the tube is set A layer of diffusion film. The light source external LED tube of claim 1, wherein each of the LED illuminators is disposed adjacent to an outer circumferential surface of the tube. The light source external LED tube of claim 1, wherein the length of the elongated through hole is smaller than the width of the elongated substrate, and the width of the elongated substrate is smaller than the diameter of the tube. The ratio of the width of the elongated through hole to the diameter of the tube is 1/2 to 1/7. The light source external LED tube according to claim 1, wherein the elongated through hole has a width of 4.5 mm to 5.5 mm, and the elongated substrate has a width of 8 mm to 12 mm.