TW201533378A - Illuminating tube device - Google Patents

Abstract

An illuminating tube device includes a hollow tube, a light guide plate disposed in the hollow tube, and a light-emitting unit. The light guide plate is provided with a plurality of recesses and through holes respectively arranged between the recesses, and each of the through holes is formed with at least one light-incident surface at an inner wall thereof. The light-emitting unit includes a plurality of LED elements, and the LED elements are respectively disposed in the through holes, and emit lights towards the light-incident surfaces, so that the lights in the light guide plate are guided by the recesses to project outwards from the recesses.

Description

Lamp device

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

Fluorescent lamps are commonly used lighting fixtures. In recent years, LED lamps have gradually replaced traditional fluorescent lamps and become mainstream lighting lamps due to their advantages of environmental protection, energy saving, long life and high efficiency.

Generally, a light-emitting diode is disposed in the illumination tube, and the light-emitting diode emits light outward through the tube wall in the illumination tube. However, a part of the parallel light of each side of the light-emitting diode is in the illumination tube. Constantly reflecting back and forth, and gradually consuming its energy, not only wastes energy, but also does not help the brightness increase.

It can be seen that the above existing lighting tubes obviously still have inconveniences and defects, and need to be further improved. Therefore, how to effectively solve the above inconveniences and defects is one of the current important research and development topics, and it has become an urgent need for improvement in related fields.

In view of the above, it is an object of the present invention to provide a lamp device for solving the inconveniences and defects mentioned in the prior art above, that is, By changing the direction of the light, the light extraction efficiency is enhanced, and the brightness of the light source is enhanced.

In order to achieve the above object, according to an embodiment of the present invention, the lamp device comprises a hollow tube body, a light guide plate and a light emitting unit. The hollow tubular body has a first major axis direction. The light guide plate is located in the hollow tube body and includes a plurality of concave grooves, a plurality of through holes, an upper surface and a lower surface. The upper surface and the lower surface are opposite. The grooves are located on the upper surface, each groove has a second major axis direction, and the second major axis direction intersects the first major axis direction. The through hole penetrates the upper surface and the lower surface, and is spaced between the grooves along the first major axis direction, and each of the through holes has at least one light incident surface. The light emitting unit includes a carrier and a plurality of light emitting diodes. The carrier plate is in contact with the lower surface portion and carries the light emitting diodes. The light emitting diodes are respectively sleeved in the through holes, and emit light toward the light incident surface, and the light is guided by the concave grooves in the light guide plate to be emitted outside the concave grooves.

In one or more embodiments of the present invention, each of the grooves has a V-shaped or trapezoidal shape in a cross section perpendicular to the first major axis direction.

In one or more embodiments of the present invention, each of the grooves has two opposite slopes in a cross section perpendicular to the first major axis direction.

In one or more embodiments of the present invention, each of the two bevels of each of the grooves has an angle with the normal of the carrier, and the angle of the angle is in a range formed by 50 to 75 degrees.

In one or more embodiments of the invention, each of the grooves has a recessed depth. The vertical distance between the upper surface and the lower surface of the light guide plate is the thickness of the light guide plate, and the depth of the recess is smaller than the thickness of the light guide plate.

In one or more embodiments of the present invention, each of the light emitting diodes has a height, wherein the height is less than or equal to the thickness of the light guide plate.

In one or more embodiments of the present invention, the lamp device further comprises a gel. The colloid covers the surface of the light-emitting diode.

In one or more embodiments of the invention, the gel comprises a wavelength converting material.

In one or more embodiments of the present invention, the lamp device further includes a heat dissipation plate. The heat sink is located on one side of the carrier relative to the light guide.

In one or more embodiments of the present invention, the light guide plate further includes a plurality of optical microstructures, and the optical microstructures are located at least one of an upper surface and a lower surface.

In summary, the technical solution of the present invention has obvious advantages and beneficial effects compared with the prior art. With the above technical solutions, considerable technological progress can be achieved, and industrially widely used value, which has at least the following advantages: 1. Improve luminescence performance; and 2. Save power and cost.

The above description will be described in detail in the following embodiments, and further explanation of the technical solutions of the present invention will be provided.

100,101‧‧‧Light tube installation

110‧‧‧ hollow body

111‧‧‧ accommodating space

200‧‧‧Light guide plate

201‧‧‧ upper surface

202‧‧‧lower surface

210‧‧‧ Groove

211‧‧‧Bevel

220‧‧‧through holes

221‧‧‧Into the glossy surface

230A, 230B‧‧‧ optical microstructure

300‧‧‧Lighting unit

310‧‧‧ Carrier Board

311‧‧‧ bearing surface

320‧‧‧Lighting diode

321‧‧‧ grain

322‧‧‧colloid

323‧‧‧wavelength conversion material

400‧‧‧heat plate

AA‧‧‧ hatching

D‧‧‧ Depth of depression

H‧‧‧ Height

L1, L2‧‧‧ rays

M‧‧‧ partial

N‧‧‧ Carrier normal

V‧‧‧ thickness

X‧‧‧first long axis direction

Y‧‧‧second long axis direction

Z‧‧‧ third long axis direction

Θ‧‧‧ angle

1 is a top view of a lamp unit in accordance with an embodiment of the present invention.

Fig. 2 is a cross-sectional view along line AA of Fig. 1.

FIG. 3 is a schematic view showing the ray travel of FIG. 2.

Fig. 4 is a side elevational view of a lamp tube apparatus according to another embodiment of the present invention, the cross-sectional position of which is the same as that of Fig. 2.

Figure 5 is a partial enlarged view of a portion M of Figure 2,

Figure 6 is a partial enlarged view of a further embodiment of the present invention, the local position of which is the same as the partial position of Figure 5.

The embodiments of the present invention are disclosed in the following drawings, and the details of However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

As used herein, "about", "about" or "roughly" is generally the error or range of the index value within 20%, preferably within 10%, and more preferably Within five percent. In the text, unless otherwise stated, the numerical values mentioned are regarded as approximations, that is, they have an error or range as expressed by "about", "about" or "approximately".

1 is a top view of a lamp unit 100 in accordance with an embodiment of the present invention. Fig. 2 is a cross-sectional view along line AA of Fig. 1.

As shown in FIGS. 1 and 2, a lamp unit 100 includes a hollow tube body 110, a light guide plate 200, and a light emitting unit 300. Hollow tube 110 has a first major axis direction X and extends toward the first major axis direction X. The light guide plate 200 is located in the hollow tube body 110, and the light guide plate 200 includes a plurality of concave grooves 210 and through holes 220. Each of the grooves 210 has a second major axis direction Y and extends toward the second major axis direction Y, and the second major axis direction Y is orthogonal or at least intersects with the first major axis direction X. The through holes 220 are respectively located between any two adjacent grooves 210, and the inner wall of each of the through holes 220 has a light incident surface 221 . The light emitting unit 300 includes a carrier 310 and a plurality of LEDs 320 electrically connected to the carrier 310. The light emitting diodes 320 are respectively fitted into the through holes 220 and emit light toward the light incident surface 221 in the through holes 220.

FIG. 3 is a schematic view showing the ray travel of FIG. 2. As shown in FIG. 3, when the light L1 emitted from the side of each of the light-emitting diodes 320 reaches the groove 210 in the light guide plate 200, it is guided by the groove 210, so that some of the light L2 can be At the same time, the groove 210 is emitted outside the third long axis direction Z. The third major axis direction Z is orthogonal to the second major axis direction Y and the first major axis direction X.

Therefore, the light that is continuously reflected by the light-emitting diodes in the hollow tube can be changed by the action of the grooves on the light guide plate, thereby being effectively utilized, thereby improving light extraction efficiency and enhancing light output. The purpose of brightness. In addition, in order to achieve the same brightness standard, compared with the prior art, the present invention can achieve the purpose of saving power and cost by improving the light extraction efficiency.

More specifically, as shown in FIG. 2, the hollow tubular body 110 has a transparent or at least light transmitting property, and has a cylindrical shape and a receiving space 111 extending also in the first major axis direction X. However, the shape of the hollow tubular body 110 is not limited to a cylinder. In other embodiments, the hollow tubular body may have a rectangular shape. In addition, the inner or outer surface of the hollow tubular body may have an atomization treatment to achieve uniform light.

As shown in FIG. 2, the light guide plate 200 also extends along the first major axis direction X, and is located in the accommodating space 111 of the hollow tubular body 110, and has an upper surface 201 and a lower surface 202 disposed opposite to each other. The grooves 210 are spaced apart from the upper surface 201 of the light guide plate 200. Each of the through holes 220 penetrates the light guide plate 200 and connects the upper surface 201 and the lower surface 202 of the light guide plate 200, and the through holes 220 are arranged between the grooves 210 at intervals along the first major axis direction X. A bearing surface 311 of the carrier 310 is partially connected to the lower surface 202 of the light guide plate 200. The bearing surface of the carrier 310 carries 311 and carries the LEDs 320.

In the present embodiment, as shown in FIG. 3, each of the grooves 210 has a V-shaped cross section in a vertical first major axis direction X (ie, a third major axis direction Z), and has a V-shaped cross section. The two inclined faces 211 are connected. In this manner, when the light ray L1 reaches the inclined surface 211 of the groove 210 in the light guide plate 200, each light ray L2 is reflected by the inclined surface 211 and is redirected toward the third long axis direction Z. Since each light ray changes the light exiting angle toward the third long axis direction Z according to the slope 211 of different slopes, the present invention does not limit the slope of the slope 211. In addition, it should be understood that the above-mentioned V-shape is only an example, and is not intended to limit the present invention, and those having ordinary knowledge in the technical field of the present invention may also selectively select a trapezoidal type from the disclosure of the V-shape. Geometric changes such as arcs.

Further, in the present embodiment, in order to prevent the inclined surface 211 from causing total reflection of the light L1 in the light guide plate 200, the normal N of the bearing surface 311 of the carrier 310 and the two inclined surfaces 211 of each of the grooves 210 are respectively have An angle θ, the angle of the angle θ is in a range formed by 50° to 75°, in other words, an angle (2*θ) between the two slopes 211 of each groove 210, for example, at 100° to 150° In the range formed, in this way, by the angle design of the inclined surface, total reflection of light in the light guide plate can be avoided, which not only improves the light extraction efficiency, but also has the effect of concentrating the light into the dark region.

In the present embodiment, each of the light emitting diodes 320 has a height H, and the height H of each of the light emitting diodes 320 is less than or equal to the thickness V of the light guide plate 200. For example, in order to maximize the amount of light entering the light guide plate 200 of the light emitting diode 320, the height H of each of the light emitting diodes 320 (ie, the maximum height of the light emitting diode 320) should be equal to the thickness V of the light guide plate 200. (ie, the vertical distance or the minimum linear distance between the upper surface 201 and the lower surface 202 of the light guide plate 200). However, the present invention is not limited thereto, and the height of each of the light-emitting diodes may be smaller or larger than the thickness of the light guide plate in consideration of other practical factors such as cost.

Further, in the present embodiment, each of the grooves 210 has a recess depth D. The light guide plate 200 has a thickness V (ie, a vertical distance or a minimum linear distance between the upper surface 201 and the lower surface 202 of the light guide plate 200), and the recess depth D is smaller than the thickness V of the light guide plate 200. In order to facilitate the actual fabrication and maintain the structural strength of the light guide plate 200, the recess depth D of each of the grooves 210 is as close as possible to the thickness V of the light guide plate 200, but not to the thickness V of the light guide plate 200.

In the embodiment, the lamp device 100 further includes a heat dissipation plate 400. The heat dissipation plate 400 is located on one side of the carrier 310 opposite to the light guide plate 200. As such, the thermal energy generated by the LED 320 can be subjected to the heat of the heat sink 400. Conduct and quickly leave to help extend product life.

In the illuminating unit of the present invention, the illuminating diode is not limited to the illuminating color, the illuminating intensity, the package structure or the type of operating current, as long as the illuminating diode emits light from a position of its side or near the side. When it is guided by the inclined surface of the groove and is emitted from the intended direction, it is the light-emitting diode to be protected in this case. In addition, the carrier board is, for example, a flexible circuit board or a printed circuit board. However, the present invention is not limited to the form and type of the carrier board. Any conventional wiring board that can be placed in the hollow tube body is the carrier board to be protected in this case.

For example, FIG. 4 is a side view of a lamp tube device 101 according to another embodiment of the present invention, the cross-sectional position of which is the same as that of FIG. As shown in FIG. 4, in another embodiment, the LED 320 further includes a light emitting die 321 and a colloid 322. The colloid 322 covers the surface of the light emitting diode 320. Further, the colloid 322 and the illuminating die 321 are both located in the through hole 220, and are fixed on the carrier 310, and the colloid 322 covers the illuminating die 321 so that the illuminating die 321 is encapsulated by the colloid 322. Thus, since the colloid 322 is coated on the illuminating die 321 , the colloid 322 faces the surface of the carrying surface 311 of the carrier 310 , and the remaining surface of the colloid 322 can transmit light to provide a full-circumferential light-emitting range.

In another embodiment, the colloid is not limited to its shape and material, and the shape of the colloid may be, for example, rectangular or hemispherical. The colloidal material may be, for example, an epoxy resin, a silicone, a polyetherimide, a fluorocarbon polymer, a polymethyl methacrylate (PMMA), or a polycarbonate. (PC), or a cyclic olefin copolymer (COC). However, the invention is not limited to the materials described.

In addition, in another embodiment, the colloid 322 further has a wavelength converting material 323. A wavelength converting material 323, such as a fluorescent material, can convert the wavelength of the light to change the color of the light. However, the invention is not limited to the materials described.

5 is a partial enlarged view of a portion M of FIG. 2, and FIG. 6 is a partially enlarged view showing a partial position of the same according to another embodiment of the present invention. As shown in FIG. 5 or FIG. 6, in other embodiments, the light guide plate 200 further includes a plurality of optical microstructures 230A or 230B, and the optical microstructures 230A or 230B are located on the upper surface 201 or the lower surface 202. For example, in order to enhance the light intensity or to homogenize the light of the light surface, it is conceivable to provide a plurality of optical microstructures 230A or 230B only on the upper surface 201 or only the lower surface 202 of the light guide plate 200.

However, the present invention is not limited thereto, and those having ordinary knowledge in the art to which the present invention pertains may also be elastically selected from the surface of the light guide plate and the lower surface from the disclosure of the optical microstructure disposed on the surface of the light guide plate or only the lower surface. Set changes such as optical microstructures.

Finally, the various embodiments disclosed above are not intended to limit the invention, and those skilled in the art can be protected in various modifications and refinements without departing from the spirit and scope of the invention. In the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100‧‧‧Light tube device

110‧‧‧ hollow body

111‧‧‧ accommodating space

200‧‧‧Light guide plate

201‧‧‧ upper surface

202‧‧‧lower surface

210‧‧‧ Groove

211‧‧‧Bevel

220‧‧‧through holes

221‧‧‧Into the glossy surface

300‧‧‧Lighting unit

310‧‧‧ Carrier Board

311‧‧‧ bearing surface

320‧‧‧Lighting diode

400‧‧‧heat plate

M‧‧‧ partial

X‧‧‧first long axis direction

Y‧‧‧second long axis direction

Z‧‧‧ third long axis direction

Claims (10)

A lamp tube device comprising: a hollow tube body having a first long axis direction; a light guide plate disposed in the hollow tube body, comprising: an upper surface and a lower surface, the upper surface being opposite to the lower surface; a plurality of grooves are disposed on the upper surface, each of the grooves having a second major axis direction, wherein the second major axis direction intersects the first major axis direction; and a plurality of through holes respectively extending through the light guide plate And connecting the upper surface and the lower surface of the light guide plate and spaced between the recesses along the first major axis direction, and each of the inner walls of the through holes has at least one light incident surface; An illuminating unit includes a carrier plate and a plurality of illuminating diodes. The carrier plate is connected to the lower surface portion and carries the illuminating diodes. The illuminating diodes are respectively sleeved in the through holes. And emitting light to the light incident surfaces, wherein the light is guided by the concave grooves in the light guide plate to be emitted outside the concave grooves. The lamp unit of claim 1, wherein each of the grooves has a V-shaped or trapezoidal shape in a cross section perpendicular to the first major axis. The lamp unit of claim 2, wherein each of the grooves has two opposite slopes in a cross section perpendicular to the first major axis direction. The lamp device of claim 3, wherein the two inclined faces of each of the grooves have an angle between the two inclined faces and the normal to the carrier, and the angle of the angle is 50° to Within the range formed by 75°. The lamp device of claim 4, wherein each of the grooves has a recessed depth, and a vertical distance between the upper surface and the lower surface of the light guide plate is a thickness of the light guide plate, wherein the recess depth is smaller than the guide Light board thickness. The lamp device of claim 5, wherein each of the light emitting diodes has a height, wherein the height is less than or equal to the thickness of the light guide plate. The lamp device of any one of claims 1 to 6, further comprising: a colloid covering the surface of the light emitting diodes. The lamp device of claim 7, wherein the colloid comprises a wavelength converting material. The lamp tube device of claim 8, further comprising: a heat dissipation plate located on a side of the carrier plate opposite to the light guide plate. The lamp device of claim 9, wherein the light guide plate further comprises a plurality of optical microstructures, the optical microstructures being located at least one of the upper surface and the lower surface.