CN215174304U - Light guide plate and lamp assembly - Google Patents

Abstract

The utility model relates to a light guide plate, including light-emitting end face, reflection of light terminal surface and light-entering side, the reflection of light terminal surface includes first reflection of light district and the second reflection of light district that links to each other, and first reflection of light district is close to light-entering side, and first reflection of light district has a plurality of rows of point type reflection of light portions of arranging according to the preset distance, and point type reflection of light portion includes the reflection of light point of a plurality of interval preset distances, and the reflection of light point is hemispherical or the spherical segment form; the second light reflecting area is provided with a plurality of rows of strip type light reflecting parts which are arranged according to a preset distance, and the cross section of each strip type light reflecting part is in a semicircular or arc V shape. The utility model has the advantages that: meanwhile, the light guide plate adopting two reflecting structures can combine the advantages of the two reflecting structures, and the space utilization rate of the light guide plate is higher compared with the light guide plate with a single strip type reflecting part; compared with the light guide plate with an independent point type light reflecting part, the light guide plate has higher energy utilization rate.

Description

Light guide plate and lamp assembly

Technical Field

The utility model relates to a lamps and lanterns field.

Background

The light guide plate is made of light guide materials such as PC, PMMA and the like, and is applied to a surface-emitting lamp, and a plurality of raised or recessed microstructures are usually arranged on the surface of the light guide plate and used for adjusting and integrating light paths. The light guide plate surface type reflecting structures on the market at present are single, and are commonly in a spherical lattice structure and a tooth-shaped structure.

The single lattice structure has a low utilization rate of light, so that the energy of light reflected by the final light guide plate is low, and if the brightness of the lamp is improved by improving the power of the LED light source, the PCB can be excessively heated to influence other performances.

The single tooth-shaped structure (naked eye presents the straight line reflecting structure who arranges for the interval), and the utilization ratio of focusing is although higher, when adopting the light source to be the many lamp core lamp sources of RGB, the very easily mixed light of light guide plate head is uneven and the phenomenon of giving out light appears promptly, seriously influences product appearance, in order to avoid influencing light-emitting effect and product appearance, then can shelter from the luminous portion that the head sent out light, leads to the space extravagant, improves overall cost.

Disclosure of Invention

For the weak point of avoiding the background art, the utility model provides a light guide plate can combine two kinds of reflective structure's advantage, and space utilization and light energy utilization are higher.

The utility model provides a light guide plate, including light-emitting end face, reflection of light terminal surface and light side of advancing, the reflection of light terminal surface includes first reflection of light district and the second reflection of light district that links to each other, and first reflection of light district is close to light side of advancing, and first reflection of light district has a plurality of rows of point type reflection of light portion of arranging according to the preset distance, and point type reflection of light portion includes the reflection of light point of a plurality of interval preset distances; the second light reflecting area is provided with a plurality of rows of strip type light reflecting parts which are arranged according to a preset distance.

Preferably, the reflective dots are hemispherical or spherical segment shaped.

Preferably, the bar type light reflecting part has a semicircular or arc-shaped V-shaped cross section.

The utility model also provides a lamp assembly, which comprises a lamp shell, a circuit board component, a reflective film and the light guide plate; the circuit board assembly comprises a circuit board and a plurality of LED light-emitting modules fixed on the circuit board; the circuit board assembly and the light guide plate are fixedly arranged at the bottom of the lamp shell, the circuit board assembly is arranged on the light inlet side face of the light guide plate, and light rays generated by the LED light emitting module enter from the light inlet side face of the light guide plate; the reflecting film is arranged between the reflecting end surface of the light guide plate and the lamp shell.

The light guide plate further comprises a light transmitting film, and the light transmitting film is laid on the light emergent end face of the light guide plate; the light-transmitting film comprises a pattern area and a non-pattern area, wherein the pattern area is provided with a light-homogenizing coating, and the light-homogenizing coating is used for homogenizing light rays emitted from the light-emitting surface of the light guide plate; and the non-pattern area is printed with a shading coating which is used for shading the light emitted from the light-emitting end face of the light guide plate.

The utility model has the advantages that: meanwhile, the light guide plate adopting two reflecting structures can combine the advantages of the two reflecting structures, and the space utilization rate of the light guide plate is higher compared with the light guide plate with a single strip type reflecting part; compared with the light guide plate with an independent point type light reflecting part, the light guide plate has higher energy utilization rate.

Drawings

Fig. 1 is a perspective view of a light guide plate according to embodiment 1.

FIG. 2 is an exploded view of the lamp assembly according to embodiment 2.

Detailed Description

The invention is further described with reference to the following drawings and specific examples.

Embodiment 1, referring to fig. 1, a light guide plate includes a light exit end surface, a light reflection end surface, and a light entrance side surface, where the light reflection end surface includes a first light reflection area 31 and a second light reflection area 33 connected to each other, the first light reflection area 31 is adjacent to the light entrance side surface, the first light reflection area 31 has a plurality of rows of dot reflection portions arranged at a predetermined distance, each dot reflection portion includes a plurality of reflection dots 32 spaced at a predetermined distance, and each reflection dot 32 is hemispherical or segment-shaped; the second light reflecting region 33 has a plurality of rows of bar-shaped light reflecting portions 34 arranged at a predetermined distance, and the cross section of each bar-shaped light reflecting portion 34 is semicircular or arc-shaped; the light enters the light guide plate 3 from the light inlet side surface and is subjected to various refractions or reflections in the light guide plate, and when the light reaches the light reflecting end surface, the light meets the point type light reflecting part or the strip type light reflecting part on the light reflecting end surface and then is reflected to exit the light guide plate from the light outlet end surface.

The light guide plate of the embodiment can combine the advantages of two types of light reflecting structures in the background technology, and can avoid the disadvantages of the two types of light reflecting structures simultaneously, and the specific principle is as follows: the point type light reflecting part is arranged in the first light reflecting area of the head part close to the light inlet side face, and has the advantages of good light mixing effect, no occurrence of a color phenomenon and low light utilization rate. However, for a light guide plate with a longer length, the light guide plate is characterized in that the light energy is stronger as the light guide plate is closer to a light source, and gradually weakened as the light guide plate is farther from the light source, and if the light guide plate is to achieve the purpose of uniform light emission of the whole plate, the arrangement density degree of the light reflecting structures at different distances from the light source needs to be calculated through software, that is, the light reflecting structures are arranged more densely as the positions of the light reflecting structures and the light source are farther from each other; in other words, the light-reflecting structure with less dense head area actually wastes a part of light utilization rate, so that the light-guiding plate can emit light uniformly; therefore, in the embodiment, the first light reflecting area is close to the light source, and the light energy in the head area can make up for the disadvantage that the point type light reflecting part has low utilization rate of light; and the strip type reflecting parts are arranged in the second reflecting area at the middle and rear ends, and the strip type reflecting parts have the advantage of higher light utilization rate and can compensate the light attenuation condition at the rear end of the light guide plate. In summary, the light guide plate adopts two types of light reflecting structures at the same time, and the space utilization rate of the light guide plate is higher compared with the light guide plate with a single strip type light reflecting part; compared with the light guide plate with an independent point type light reflecting part, the light guide plate has higher energy utilization rate.

Embodiment 2, referring to fig. 2, a lamp assembly includes a lamp housing 1, a circuit board assembly 2, a reflective film 4, a light transmissive film 5, and a light guide plate 3; the circuit board assembly 2 comprises a circuit board and a plurality of LED light-emitting modules fixed on the circuit board; the circuit board assembly 2 and the light guide plate 3 are fixedly arranged at the bottom of the lamp shell 1;

the light guide plate 3 comprises a light outlet end face, a light reflecting end face and a light inlet side face, the circuit board assembly 2 is arranged on the light inlet side face of the light guide plate 3, and light rays generated by the LED light emitting module enter from the light inlet side face of the light guide plate; the light-reflecting end face comprises a first light-reflecting area and a second light-reflecting area which are connected, the first light-reflecting area is close to the light-entering side face, the first light-reflecting area is provided with a plurality of rows of point type light-reflecting parts which are arranged according to a preset distance, each point type light-reflecting part comprises a plurality of light-reflecting points which are spaced at the preset distance, and each light-reflecting point is hemispherical or in a spherical segment shape; the second light reflecting area is provided with a plurality of rows of strip type light reflecting parts which are arranged according to a preset distance, and the cross sections of the strip type light reflecting parts are semicircular or arc V-shaped; the reflecting film 4 is arranged between the reflecting end face of the light guide plate and the lamp shell 1, and can reflect the light rays emitted from the reflecting end face into the light guide plate 3 again; the light-transmitting film 5 is laid on the outer surface of the light-emitting end face of the light guide plate 3; the light-transmitting film 5 comprises a pattern area and a non-pattern area, wherein the pattern area is provided with a light-homogenizing coating which is used for homogenizing light rays emitted from the light-emitting surface of the light guide plate; the non-pattern area is printed with a shading coating which is used for shading light rays emitted from the light-emitting end face of the light guide plate; the light-transmitting film 5 can make the lamp assembly irradiate a preset light-emitting pattern.

The technical effect of the light guide plate in the lamp assembly of the embodiment can be seen in embodiment 1, the lamp assembly using the light guide plate has higher space utilization rate and lower overall cost, and meanwhile, the luminous intensity can also reach the expected target.

Although the present invention has been described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention encompassed by the appended claims.

Claims (5)

1. A light guide plate, characterized in that: the light-emitting device comprises a light-emitting end face, a light-reflecting end face and a light-entering side face, wherein the light-reflecting end face comprises a first light-reflecting area and a second light-reflecting area which are connected, the first light-reflecting area is close to the light-entering side face, the first light-reflecting area is provided with a plurality of rows of point type light-reflecting parts which are arranged according to a preset distance, and each point type light-reflecting part comprises a plurality of light-reflecting points which are spaced at the preset distance; the second light reflecting area is provided with a plurality of rows of strip type light reflecting parts which are arranged according to a preset distance.

2. A light guide plate according to claim 1, wherein: the reflective dots are hemispherical or spherical segment.

3. A light guide plate according to claim 1, wherein: the cross section of the strip type light reflecting part is in a semicircular or arc V shape.

4. A lamp assembly, comprising: comprising a lamp housing, a circuit board assembly, a reflective film and a light guide plate according to any one of claims 1 to 3; the circuit board assembly comprises a circuit board and a plurality of LED light-emitting modules fixed on the circuit board; the circuit board assembly and the light guide plate are fixedly arranged at the bottom of the lamp shell, the circuit board assembly is arranged on the light inlet side face of the light guide plate, and light rays generated by the LED light emitting module enter from the light inlet side face of the light guide plate; the reflecting film is arranged between the reflecting end face of the light guide plate and the lamp shell.

5. The lamp assembly of claim 4, wherein: the light guide plate is characterized by also comprising a light-transmitting film, wherein the light-transmitting film is laid on the light-emitting end face of the light guide plate; the light-transmitting film comprises a pattern area and a non-pattern area, wherein the pattern area is provided with a light-homogenizing coating, and the light-homogenizing coating is used for homogenizing light rays emitted from the light-emitting surface of the light guide plate; and the non-pattern area is printed with a shading coating which is used for shading light rays emitted from the light-emitting end face of the light guide plate.

Images