TWM448617U - Light guide and led lamp using the same - Google Patents

Description

Light guide plate and LED lamp

The novel is an LED lamp, in particular to a light guide plate and an LED lamp.

At present, the development of LED (Light Emitting Diode) lamps has entered a stage of rapid development, and has gradually replaced the situation of traditional lamps. At present, most of the LED lighting developers are moving forward in the direction of how to develop LED lamps with low power consumption, low heat production, fast heat dissipation, high brightness and high power.

The main difference between LED lamps and other lamps is that the LED light source used in LED lamps is emitted by LED dies, which is close to the point source. Moreover, in different applications, the larger the area of the luminaire, the more LED dies are needed. Due to the point light source characteristics of the LED, in the design of the LED lamp, how to guide the light so that the light source can be scattered into a uniform light source becomes one of the design priorities of the LED lamp.

In order to make the point light source of LED can be uniformly emitted as the light source that people want, at present, there are probably three LED lamp design methods: I. Direct type, LED light source directly faces the user, most of which is by uniform dispersion of LED crystal The grain is designed in such a way as to add a glass or a plastic plate; II. Reflective, the LED light source faces a reflecting surface, and directly reflects the light source through a reflecting surface (usually a curved surface); III. Side-illuminated, from the side, And directing the light generated by the LEDs to a specific direction via the light guide plate.

Among them, the direct-type design has the problem of uneven luminosity, and it is easy for the user to generate glare. However, the structure is simple and the cost is low. The reflective and side-lit design has a complicated structure and high cost, but it has better uniformity of illumination and less glare.

In the increasingly fierce LED lighting industry, how to integrate the direct low-cost advantages, and to synchronize the characteristics of other technologies, such as uniformity and glare-free, will become the research direction of the LED lighting industry.

In view of the fact that the above conventional technology cannot achieve the effects of low cost, high uniformity, no glare, etc., the present invention provides a light guide plate, which can make the LED lamps have the above effects synchronously, and can achieve the special effects of visual beauty.

The invention provides a light guide plate for use in an LED lamp. The LED lamp comprises an LED light source. The light guide plate comprises: a body comprising a light incident surface and an optical light exiting surface, the light incident surface is flat and facing the LED light source, and the optical The light-emitting surface has a stereoscopic light guiding structure, which can scatter a light source emitted by the LED light source to uniformly scatter the light source and display different patterns from different directions.

The invention further provides a light guide plate for use in an LED lamp. The LED lamp comprises an LED light source, and the light guide plate comprises: a first layer of light guide plate and a second layer of light guide plate. The first light guiding plate comprises a light incident surface and a first optical light emitting surface, wherein the light incident surface is flat and faces the LED light source, and the first optical light emitting surface has a first three-dimensional light guiding structure, and the LED can be used. One of the light sources emitted by the light source is scattered for the first time. The second light guide plate comprises a bonding surface and a second optical light emitting surface, wherein the first bonding surface is closely coupled with the first optical light emitting surface, so that the first scattering of the light source is incident on the second light guiding plate, and the second optical light emitting surface The back surface is opposite to the bonding surface and has a second stereoscopic light guiding structure. The second stereoscopic light guiding structure causes the first scattering of the light source to perform second scattering to uniformly scatter the light source and display different patterns from different directions.

The invention further provides an LED lamp comprising: a casing, an LED light source and at least one light guide plate. Wherein, the outer casing has a receiving structure; the LED light source is disposed in the accommodating structure of the outer casing, and the LED light source has a light emitting surface of the light source. The light guide plate is disposed in the accommodating structure, the light guide plate comprises a light incident surface and an optical light exiting surface, the light incident surface is a plane and faces the light emitting surface of the LED light source, and the optical light emitting surface has a stereo light guiding structure. A light source emitted by the LED light source is scattered to uniformly scatter the light source and display different patterns from different directions.

The invention further provides an LED lamp comprising: a casing, an LED light source and at least one light guide plate. Wherein, the outer casing has a receiving structure; the LED light source is disposed in the accommodating structure of the outer casing; the LED light source has a light emitting surface; the first layer of light guiding plate, the first layer of the light guiding plate comprises a light incident surface and a first optical light output a light-emitting surface of the light source facing the LED light source, the first optical light-emitting surface having a first three-dimensional light guiding structure for first scattering the light source emitted by the LED light source; The second light guide plate comprises a bonding surface and a second optical light emitting surface, wherein the first bonding surface is closely coupled with the first optical light emitting surface to cause the first scattering of the light source to be incident on the second light guiding plate, and the second optical light emitting surface The back surface is opposite to the bonding surface and has a second stereoscopic light guiding structure. The second stereoscopic light guiding structure causes the first scattering of the light source to perform second scattering to uniformly scatter the light source and display different patterns from different directions.

The above and other objects, features, and advantages of the present invention will become more apparent and understood.

The novel design has a light guide plate, which can be applied to the design of a direct-lit LED lamp, thereby solving the problem of glare and poor uniformity of the direct-type LED lamp. At the same time, it retains the low-cost features of the direct-lit LED luminaires, and increases the visual effect of different patterns at different angles. Moreover, different stereoscopic effects can be produced at different angles. Make this The new LED lamps not only have the power saving of LED lamps, but also have beautiful features.

Please refer to FIGS. 1A-1C for a perspective view of one embodiment of the light guide plate, a cross-sectional view taken along line B-B, and a cross-sectional view taken along line A-A. As can be seen from the figure, the body of the light guide plate 101 includes the light incident surface 120 and the optical light exit surface 110. Wherein, the light incident surface 120 is a flat surface and faces the LED light source (please refer to FIG. 4A synchronously), and the optical light emitting surface 110 has a stereo light guiding structure, which can scatter the light source emitted by the LED light source to uniformly scatter the light source and Different patterns can be displayed in different directions. In this embodiment, the stereoscopic light guiding structure is a sharp-angled elongated structure formed by a plurality of pointed strips. Wherein, the angle of each sharp corner can be between 30 degrees and 150 degrees. Moreover, in this embodiment, each of the pointed strips is closely packed. In practice, it is also possible to adopt a method that is not closely arranged.

Next, please refer to FIGS. 2A-2C, which are respectively a perspective view of an embodiment of the light guide plate 102 of the present invention, a cross-sectional view taken along line B-B, and a cross-sectional view taken along line A-A. In this embodiment, the stereoscopic light guiding structure is a dome-shaped strip structure which is formed by arranging a plurality of dome strips. Among them, the arc angle of each dome can be between 30 degrees and 180 degrees. Moreover, in this embodiment, each dome strip is closely packed. In practice, it is also possible to adopt a method that is not closely arranged.

Please refer to FIGS. 3A-3C , which are respectively a perspective view of an embodiment of the light guide plate 103 , a cross-sectional view taken along line B-B, and a cross-sectional view taken along line A-A. In this embodiment, the stereoscopic light guiding structure is a micropyramid structure, which is formed by arranging a plurality of micro pyramids as a matrix. Among them, the face angle of each micro-pyramid can be between 30 degrees and 60 degrees. Further, in this embodiment, each of the micro-pyramids is closely arranged. In practice, it is also possible to adopt a method that is not closely arranged.

In addition to the implementation of Figures 1A to 3C, other structures may be employed, such as a micro-dot-type structure with a micro-dot structure. Alternatively, a custom patterned structure that can be defined by the customer A variety of ways to see different patterns at different angles, so that LED lamps not only have the function of lighting, but also have beautiful effects. Among them, the embodiments of FIGS. 1A and 2A can achieve a three-dimensional visual effect, and the embodiment of FIG. 3A can achieve a three-dimensional visual effect.

In addition, the shape of the light guide plate may be square, rectangular, circular, and elongated. In the embodiment of Figs. 1A to 3C, a square design is adopted, for example, an office lamp of 60 cm x 60 cm can be used. If it is designed to be round, it can be used on a ceiling lamp. If it is designed as a long strip, it can be used on long strips of LED fluorescent lamps. Any of the LED lamps can be designed using the novel light guide plate. Hereinafter, a square LED lamp will be taken as an example to illustrate the specific effects that can be achieved by the LED lamp used in the light guide plate of the present invention.

Please refer to the 4A~4C drawings, which are schematic cross-sectional views of one embodiment of the LED lamp of the present invention. When the LED lamp is lit, the light pattern of the lamp viewed in the C direction is displayed, and when the LED lamp is lit, A schematic diagram of the light pattern seen in the direction of D.

In FIG. 4A, the LED lamp includes a light guide plate 101, an LED light source (composed of the circuit board 200 and the LED die 210), and a housing 300. The LED light source is disposed in the accommodating structure of the outer casing 300, and the LED light source has a light emitting surface, that is, a side on which the LED dies 210 are disposed. The light guide plate 101 is disposed in the accommodating structure of the outer casing 300.

It can be observed from FIG. 4A that the light incident surface 120 of the light guide plate 101 faces the light emitting surface of the LED light source (LED die 210), and the LED light source can be emitted by the stereo light guiding structure of the optical light emitting surface 110. The light source is scattered out to evenly scatter the source and display different patterns from different directions.

For example, in FIG. 4B, when standing under the LED lamp, if the LED die 210 is uniformly disposed on the circuit board 200 in the C direction, the effect of the strip pattern 150 can be exhibited. In Figure 4C, when standing next to the LED luminaire and looking in the D direction, a wave-like pattern 160 effect can be seen. Since the effects seen from different directions are different, they cannot be drawn one by one, and there is no more detail here.

In short, the LED lamps made by using the light guide plate of the present invention can exhibit different patterns in different directions, and in some directions, have stereoscopic effects.

In addition, the present invention can obtain more varied stereoscopic effects by stacking a plurality of light guide plates.

Please refer to FIGS. 5A-5B , which are respectively a schematic diagram and a cross-sectional view of a layered structure of another embodiment of the LED lamp of the present invention. In this embodiment, two light guide plates 101 are used to form light guiding structures in different directions. As shown in the figure, the light guiding structures of the two light guide plates 101 are vertically arranged.

In other embodiments, a variety of different light guides can be stacked on each other to create a greater variety of visual effects.

Please refer to FIGS. 6A-6C , which are respectively a perspective view of another embodiment of the light guide plate, a cross-sectional view taken along line B-B, and a cross-sectional view taken along line A-A. In this embodiment, a two-layered pointed strip light guiding structure is fabricated into the same light guiding plate 104. This embodiment will achieve the same visual effect as the embodiment of Figure 5A. However, the manner in which the light guide plate 104 is fabricated differs from the manner in which the light guide plate 101 of FIG. 5A is produced.

In the LED lamp manufactured by using the light guide plate of FIG. 6A, the light guide plate 104 has a structure of a first layer of light guide plate and a second layer of light guide plate. Wherein, the first layer of light guiding plate comprises a light incident surface and a first optical light emitting surface, wherein the light incident surface is a plane and faces the light emitting surface of the LED light source, and the first optical light emitting surface has a first three-dimensional light guiding structure, which can The light source emitted by the LED light source is scattered for the first time. The second layer of light guide plate comprises a bonding surface and a second optical light emitting surface, the first bonding surface and the first The optical illuminating surface is tightly coupled to cause the first scattering of the light source to be incident on the second layer of light guiding plate, the second optical illuminating surface is opposite to the bonding surface and has a second stereoscopic light guiding structure, and the second stereoscopic light guiding structure makes the first light source The secondary scattering then performs a second scattering to evenly scatter the source and display different patterns from different directions.

The light transmittance of the light guide plate of the present invention can reach 95% of single layer and 93% of excellent transmittance of the double layer, and the LED lamp designed by using the light guide plate of the present invention has anti-glare, high uniformity and has Multiple specific effects such as stereoscopic beauty.

Although the preferred embodiment of the present invention is disclosed above, it is not intended to limit the present invention, and those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. The scope of the new patent protection shall be subject to the definition of the scope of the patent application attached to this specification.

101/102/103/104‧‧‧Light guide

110‧‧‧Optical glazing

120‧‧‧Into the glossy surface

150‧‧‧ long strips

160‧‧‧ wave pattern

200‧‧‧ boards

210‧‧‧LED dies

300‧‧‧ Shell

1A is a perspective view of an embodiment of a light guide plate of the present invention; FIG. 1B is a cross-sectional view taken along line BB in the embodiment of FIG. 1A; FIG. 1C is a view of FIG. 2A is a perspective view of another embodiment of the light guide plate of the present invention; FIG. 2B is a cross-sectional view taken along line BB of the embodiment of FIG. 2A; 2C is a cross-sectional view taken along line AA of the embodiment of FIG. 2A; FIG. 3A is a perspective view of another embodiment of the light guide plate of the present invention; FIG. 3B is a 3A drawing of the present creation The cross-sectional view along the line BB in the embodiment; the 3C is a cross-sectional view along the line AA in the embodiment of FIG. 3A; FIG. 4A is a schematic cross-sectional view of an embodiment of the LED lamp of the present invention; and 4B is a schematic diagram of a light-emitting pattern seen in the C direction when the LED lamp is lit in the embodiment of FIG. 4A of the present creation; FIG. 4C is a diagram of the fourth embodiment of the present creation, when FIG. 5A is a schematic diagram of a layered structure of another embodiment of the LED lamp of the present invention; FIG. 5B is a fifth embodiment of the creation of the present invention; Figure 6A is a perspective view of another embodiment of the light guide plate of the present invention; Figure 6B is a cross-sectional view taken along line BB of the embodiment of Figure 6A; and Figure 6C is A cross-sectional view taken along line AA in the embodiment of Fig. 6A of the present invention.

101‧‧‧Light guide plate

110‧‧‧Optical glazing

120‧‧‧Into the glossy surface

Claims (14)

A light guide plate is applied to an LED lamp, the LED lamp comprises an LED light source, and the light guide plate comprises: a body comprising a light incident surface and an optical light emitting surface, wherein the light incident surface is flat and faces the LED light source The optical light-emitting surface has a stereoscopic light guiding structure, which can scatter a light source emitted by the LED light source to uniformly scatter the light source and display different patterns from different directions. The light guide plate of claim 1, wherein the stereoscopic light guiding structure is selected from the group consisting of: a pointed elongated strip structure, a dome elongated strip structure, a micro diamond type structure, a micro pyramid structure, and a microcircle The dot structure and a customized pattern structure. The light guide plate of claim 1, wherein the shape of the body is selected from the group consisting of: a square shape, a rectangular shape, a circular shape and an elongated shape. A light guide plate is applied to an LED lamp, the LED lamp comprises an LED light source, the light guide plate comprises: a first layer of light guide plate, the first layer of light guide plate comprises a light incident surface and a first optical light emitting surface, The light incident surface is flat and faces the LED light source, and the first optical light emitting surface has a first stereoscopic light guiding structure, and the light source emitted by the LED light source can be firstly scattered; and a second layer The light guide plate includes a bonding surface and a second optical light emitting surface, the first bonding surface is tightly coupled to the first optical light emitting surface, and the first scattering of the light source is incident on the second layer light guiding plate, the second The optical illuminating surface faces the bonding surface and has a second stereoscopic light guiding structure, so that the first scatter of the light source is performed for a second time The light source is evenly scattered and different patterns can be displayed from different directions. The light guide plate of claim 4, wherein the first stereoscopic light guiding structure is selected from the group consisting of: a pointed elongated strip structure, a dome elongated strip structure, a micro diamond type structure, a micro pyramid structure, and a Micro-dot structure and a customized pattern structure. The light guide plate of claim 4, wherein the first layer of light guide plates and the second layer of light guide plates are shaped from a square shape, a rectangular shape, a circular shape and an elongated shape. An LED lamp comprising: a housing having a receiving structure; an LED light source disposed in the receiving structure of the housing, the LED light source having a light emitting surface; and at least one light guiding plate disposed in the housing In the structure, the light guide plate comprises a light incident surface and an optical light emitting surface, wherein the light incident surface is a plane and faces the light emitting surface of the LED light source, and the optical light emitting surface has a stereo light guiding structure, which can One of the light sources emitted by the LED light source is scattered to uniformly scatter the light source and display different patterns from different directions. The LED lamp of claim 7, wherein the stereoscopic light guiding structure is selected from the group consisting of: a pointed strip structure, a dome strip structure, a micro diamond structure, a micro pyramid structure, and a micro circle. The dot structure and a customized pattern structure. The LED lamp of claim 7, wherein the body and the LED light source are shaped from a square shape, a rectangular shape, a circular shape and an elongated shape. The LED lamp of claim 7, wherein the at least one light guide plate is two or more, and the three-dimensional light guiding structures of the two light guide plates are staggered. The LED lamp of claim 10, wherein the stereoscopic light guiding structure of each of the light guide plates is selected from the group consisting of: a pointed elongated micro-trench structure, a dome-shaped micro-trench structure, and a micro-diamond. A structure, a micro-pyramid structure, a micro-dot structure and a customized pattern structure. An LED lamp comprises: a casing having a receiving structure; an LED light source disposed in the receiving structure of the casing, the LED light source having a light emitting surface; a first layer light guiding plate, the first layer The light guide plate includes a light incident surface and a first optical light emitting surface, wherein the light incident surface is a flat surface and faces the light emitting surface of the LED light source, and the first optical light emitting surface has a first three-dimensional light guiding structure. One light source emitted by the LED light source may be firstly scattered; and a second light guide plate includes a bonding surface and a second optical light emitting surface, and the first bonding surface is closely coupled to the first optical light emitting surface And causing the first light scattering of the light source to be incident on the second light guide plate, the second optical light emitting surface facing away from the bonding surface and having a second stereoscopic light guiding structure, the second solid light guiding structure making the light source The first scattering is followed by a second scattering to evenly scatter the source and display different patterns from different directions. The LED luminaire of claim 12, wherein the first stereoscopic light guiding structure is selected from the group consisting of: a pointed elongated strip structure, a dome elongated strip structure, a micro diamond type structure, a micro pyramid structure, and a Micro-dot structure and a customized pattern structure. The LED lamp of claim 12, wherein the first layer of the light guide plate, the second layer of the light guide plate, and the LED light source are selected from the group consisting of: a square, a rectangle, a circle, and an elongated strip.