Patent Description:
the present invention relates to lighting technology field, with particular emphasis on a line source lighting system.

At present, LED lamps on the market mainly use point light source lighting. This type of illumination has problems of glare and reflection glare. In order to solve the above problems, researchers try to replace the point light source with line light source generally by adopting a method of adding a diffusion lamp cover. The diffusion lamp cover diffuses the light from the LED. Since the diffusion direction is not single that the linear light source imaging is messy and fuzzy. The formed linear light source is directly used to illuminate the illuminated surface. The light distribution effect is not good, and the energy attenuation is more, making the formed line light source dim and messy. Finally the illumination on the illuminated surface is uneven, resulting in poor lighting effect.

At the same time, the existing improved line source lamps are either bulky, or in order to achieve the line source effect, the LED lamps used are more numerous, which increases the production cost. <CIT> discloses an illumination beam shaping system, which enables the emergent surface of a lighting system of light excitation chips to emit a light beam of uniform illumination brightness. The present invention uses a dividing device, structured from curved lenses arranged in an array, to effect a pre-dividing operation on the total quantity of light from a light excitation chip, after which post-diffusion is carried out to form a light beam with uniform illumination brightness. A plurality of conical light beams in an array are shaped and emerge from an output side, and the bottom portion of each of the conical light beams form an actual optical surface, which act on an optical diffusing component for refraction and diffusion processing, thereby enabling the emergent face of the system to obtain uniform illumination brightness.

In view of this, the present invention provides a line source lighting system to solve the above technical problems.

A line source lighting system, comprising:.

The invention is characterized in that the strip-shaped convex lens array and the lens are integrally formed; the strip-shaped convex lens array is disposed on a surface on which the light emitting surface of the lens is located; and the lens comprises a light transmission main part configured to focus a majority part of the light emitted by the point light source, and a light transmission secondary part disposed at an angle which is <NUM>°-<NUM>° with one side of the light transmission main part to guide a minority part of the light of the point light source, wherein on a plane perpendicular to the length direction of the lamp holder, the light incident surface of the light transmission secondary part and the light incident surface of the light transmission main part are straight lines, and the angle is formed by the intersecting straight lines.

For ease of manufacture, advantageously, the strip-shaped convex lens array is a positive cylindrical lens array.

When the strip convex lens array is a positive cylindrical lens array, the structure is a plane.

In order to adapt to different lamp structures, advantageously, the strip-shaped convex lens array is a curved surface that is curved in the length direction of the strip-shaped convex lens.

The strip-shaped convex lens array can be used directly as a lamp cover.

For easy fixing and installation, advantageously, the strip-shaped convex lens array is located between the lens and the printed circuit board.

To reduce the size, increase the distance between the strip-shaped convex lens array and the point light source in the case of limited size, advantageously, the lens is located between the strip-shaped convex lens array and the printed circuit board.

To improve the effect of forming a line light source, advantageously, the strip-shaped convex lens array is disposed on the surface where the light incident surface of the lens is
and on the surface where the light emitting surface is.

To improve the uniformity of the light, advantageously, the light transmission main part projects the majority part of the light to the distal end of the illuminated surface, and the light transmission secondary part directs the minority part of the light to the proximal end of the illuminated surface.

In order to get the effect of a line light source at all angles, advantageously, the light incident surface of the light transmission secondary part is provided with the strip-shaped convex lens array,
and the light incident surface and the light emitting surface of the light transmission main part are each provided with the strip-shaped convex lens array.

According to different requirements, the matched point light source and lens can be equipped with multiple groups,
advantageously, the printed circuit board provided with the plurality of point light sources is symmetrically arranged with two pieces, correspondingly, the lenses are two symmetrical ones.

In order to increase the beam angel of light, advantageously, the angle between the optical axes of the point light sources on the two printed circuit boards is obtuse.

The shape of the lens can be designed according to the light output effect. In order to improve the uniformity of the light output, advantageously, the lens is a polarized lens.

Advantageously, the lens is a symmetrical lens.

Advantageously, on the plane perpendicular to the length direction of the LED light fixture,
the reflection wall is provided on both sides of the point light source for reflecting the lateral light from the point light source to the light incident plane of the strip-shaped convex lens array.

Specifically, the line source lighting system of the present invention is a line source lighting lamp, including lamp holder;.

For ease of manufacture and installation, advantageously, the lamp holder includes two end seats, a strip base and a strip bed plate.

For ease of manufacture and installation, advantageously, the lens is clasped with the strip base.

In order to make the structure more compact, the lens and the strip bed plate are integrally formed and formed into a closed mounting cavity in cross section.

In order to further improve the light utilization rate, advantageously, the point light source is provided with reflective walls on both sides thereof, and the lens, the reflective wall and the strip bed plate are integrally formed and formed into a closed mounting cavity in a cross section.

In order to make the structure more compact and convenient to manufacture and install, advantageously, the two ends of the strip base are connected with the end seat to form a first accommodating cavity. The strip bed plate is located at the bottom of the first accommodating cavity, and the strip bed plate is connected with the end seat to form a second accommodating cavity.

Advantageously, the reflection wall is located above the printed circuit board and on either side of the point light source. The inner side of the upper end of the strip base is provided with a first mounting groove. The outer side of the reflection wall is provided with a convex edge matching with the first mounting groove.

Advantageously, the second accommodating cavity is provided with the printed circuit board.

Advantageously, a reflection wall integrally formed with the strip bed plate is further provided.

Advantageously, the inner side of the top of the two reflection walls is provided with a first mounting groove for fixing the strip-shaped convex lens array.

Advantageously, the outer side of the top of the two reflection walls is provided with a snap structure for fixing the lens, and the bottom of the strip bed plate is provided with a second mounting groove for fixing the printed circuit board.

The strip-shaped convex lens array is disposed on the top end of the reflection wall.

In order to guide the deflecting rays to the strip-shaped convex lens array as much as possible, advantageously, the reflection walls are disposed at an obtuse angle with the mounting surface of the point light source.

In the context of energy saving and environmental protection, LED lamps are increasingly used in home and commercial lighting fields because of their high light extraction efficiency and good light collecting performance, advantageously, the point light source uses LED chips.

Technical effects of the present invention:
The line source lighting system and the line source lighting lamp of the present invention adopt a strip-shaped convex lens array that diffuses light from the point light source only in the length direction of the lamp holder to form a line source, so that the illumination surface of the line source lighting lamp has the same illumination intensity in the longitudinal direction. The improvement of the property can prevent the light from diffusing in multiple directions, so that the line light source is purified, and the lens is arranged to perform light distribution in the other direction to the line light source, thereby reducing energy attenuation and secondary light distribution of the lens. The function can achieve uniform distribution of light as needed, so that the illumination uniformity tends to <NUM>, thereby improving the light-sweeping effect.

Illustrative embodiments are described below in conjunction with the accompanying drawings, as follows:.

Specific embodiments will be further described in detail below based on the drawings. It should be understood that the description of the embodiments herein is not intended to limit the scope of the invention.

As shown in <FIG>, the line source lighting system of the present embodiment comprises lamp holder <NUM>, printed circuit board <NUM>, a plurality of point light sources <NUM>, lens <NUM> and strip-shaped convex lens array <NUM> and reflection wall <NUM>.

The lamp holder <NUM> is used for fixing and mounting, and can be assembled by a plurality of components according to installation requirements, or can be a single component. In this embodiment, the lamp holder <NUM> comprises two end seats <NUM>, a strip base <NUM> and a strip bed plate <NUM>. Wherein, the strip base <NUM> is arranged at the bottom as a part of the lamp holder and is generally made of aluminum alloy for fixing installation and heat dissipation, the strip bed plate <NUM> is arranged above the strip base <NUM> for mounting printed circuit board <NUM> and other structures, in the actual assembly, the strip bed plate <NUM> can be set separately, in order to reduce the volume and make the structure compact, it can also be connected to the strip base <NUM> after forming with the lens <NUM>, Or it can be formed in one piece with the strip base <NUM>. However, the strip base <NUM>, lens <NUM> and strip bed plate <NUM> are separately arranged in this embodiment. Both ends of the strip base <NUM> are fixedly connected to the end seats <NUM>. The strip base <NUM> is provided with a cavity for accommodating the printed circuit board <NUM>, the lens <NUM>, and the reflection wall <NUM>. The printed circuit board <NUM>, the lens <NUM> and the reflection wall <NUM> can be fixed by screws, glue and clasp structure. In this embodiment, the two ends of the strip base <NUM> are connected with the end seat <NUM> to form a first accommodating cavity <NUM>. The strip bed plate <NUM> is located at the bottom of the first accommodating cavity <NUM>, and the strip bed plate <NUM> is connected with the end seat to form a second accommodating cavity <NUM>. The second accommodating cavity <NUM> is provided for accommodating the printed circuit board <NUM> and the reflection wall <NUM>. The reflection wall <NUM> is located above the printed circuit board and on either side of the point light source. The inner side of the upper end of the strip base <NUM> is provided with a first mounting groove <NUM>. The outer side of the reflection wall <NUM> is provided with a convex edge <NUM> matching with the first mounting groove <NUM>. The strip-shaped convex lens array <NUM> is arranged on the top end of the reflection wall <NUM>, and the Lens <NUM> fits with the strip base <NUM> by clamping.

A plurality of point light sources <NUM> are spaced apart from each other along the length direction of the lamp holder on the light source mounting surface of the printed circuit board <NUM>. Thus, the visual effect of the discontinuous point light source is formed. In the background of energy saving and environmental protection, the LED lamp is more and more applied to the home and commercial lighting field due to its high light extraction efficiency and good light collecting performance, and the point light source <NUM> is adopted LED chip.

In this embodiment, the optical axis direction of the point light source <NUM> is set as the z direction, and the mounting surface of the point light source <NUM> is a plane perpendicular to the z direction. On the mounting surface, the point light source <NUM> is arranged in the x direction, and y direction is perpendicular to the x direction. The printed circuit board <NUM> is also disposed on the mounting surface, and the xyz coordinate system can define an x-y plane, a y-z plane, and an x-z plane.

The lens <NUM> is disposed on the lamp holder <NUM>, and the number thereof can be set according to the light distribution effect to be achieved, and can be one or more. In general, a single lens can complete the light distribution effect that needs to be achieved, specifically, the lens <NUM> is connected with the strip base <NUM> by clasping and located in a light-emitting direction of the point light source <NUM> for adjusting the light distribution of the point light source <NUM> on the plane (y-z plane) perpendicular to the length direction of the lamp holder, that is, the dimming in a single plane, and the lens <NUM> can be easily manufactured by extrusion process or other ways. Since the light distribution of the LED chip itself is not uniform, this causes the linear light source imaged by the strip-shaped convex lens array <NUM> to have a region with strong brightness and weak brightness. It is easy to understand that the less luminous areas emitted light with less energy, while the more luminous areas emitted light with more energy. In order to make the final emergent light evenly distributed, the lens <NUM> preferably adopts an asymmetric lens, and the light in the weak brightness region of the linear light source is emitted from the part of the asymmetric lens that has a strong ability to focus light, while the light in the strong brightness region is emitted from the part of the asymmetric lens that has a weak ability to focus light, in this way, the consistent effect of the emergent light can be reasonably achieved. However, this does not mean that the lens <NUM> can only adopt an asymmetrical form, and a symmetrical form can also be used. In this case, the brightness of the two ends of the linear light source is brighter, and the brightness toward the middle position is weaker. When a symmetrical lens is used, the middle protruding portion of the lens <NUM> corresponds to the middle position of the linear light source, and both ends correspond to both ends of the linear light source, so that the light can be uniform. Additionally, the lens <NUM> can also take the form of an optical film. When the lens <NUM> is an optical film, the lens <NUM> and the strip-shaped convex lens array <NUM> are integrated on the same optical film, and the optical film stretches the point light source into a line source in the x direction, and performs light distribution control on the point light source in the y-z plane.

The strip-shaped convex lens array <NUM> is disposed on the lamp holder <NUM> and located between the lens <NUM> and the printed circuit board <NUM>. The strip-shaped convex lens array <NUM> is arranged along the length direction of the lamp holder <NUM> for converting each point light source <NUM> into a plurality of continuous sub-point light sources, the sub-point light sources converted by the adjacent point source <NUM> is connected or coincident. It can be seen that before using the strip-shaped convex lens array <NUM>, the point light sources <NUM> are still point light sources after passing through the lens <NUM> and become linear light sources while adding the strip-shaped convex lens array <NUM> there, as shown in <FIG>.

The strip-shaped convex lens in the strip-shaped convex lens array <NUM> can be in the form of a plane of a positive cylindrical lens, or can be a curved surface curved in the length direction of the strip-shaped convex lens, and the effect to be achieved is that the point light source is stretched in the arrangement direction (x direction) of the point light source, so that the point light source forms the line light source while minimizing or eliminating the influence on the point source <NUM> in other directions. The cross-sectional dimension of the strip-shaped convex lens can be set as needed, and the strip-shaped convex lens array <NUM> can be obtained by a process such as 3D printing, extrusion or injection molding. The distance between the strip-shaped convex lens array <NUM> and the point light source <NUM> and the distance between the adjacent point light sources <NUM> are controlled by adjusting the radian and radius of the strip-shaped convex lens. The strip-shaped convex lens array <NUM> can also achieve the same effect by using optical film. In the embodiment, the strip-shaped convex lens array <NUM> is a positive cylindrical lens microarray arranged on the optical thin film, specifically, the optical film is an elliptical light diffusing film, and the model used is E-<NUM>. Of course, other models can be selected as long as the point light source <NUM> is stretched in the arrangement direction (x direction) of the point light source <NUM>. For example, E-<NUM>, E-<NUM>/<NUM>, E-<NUM> can also be used. In order to achieve a better tensile diffusion effect, when the diffusion film is selected, the stretching ratio in both directions is greater than <NUM>. In the present embodiment, the elliptical light diffusing film is a positive cylindrical lens microarray, the length direction of the positive cylindrical lens is perpendicular to the arrangement direction (x direction) of the point light source <NUM> when used. The strip-shaped convex lens array <NUM> in the form of film has a small volume, is easy to install, and can be bent to meet different lamp structure requirements.

In order to further improve the light utilization rate of the LED light fixture, on the plane perpendicular to the length direction of the LED light fixture, the reflection wall <NUM> is provided on both sides of the point light source <NUM> for reflecting the lateral light from the point light source <NUM> to the light incident plane of the strip-shaped convex lens array <NUM>. Of course, the absence of the reflection wall <NUM> does not affect the use of the LED lighting system, that is, the reflection wall <NUM> is not an essential functional component, the upper end of the reflection wall <NUM> extends to the bottom surface of the strip-shaped convex lens array <NUM>, and the point light source <NUM> is disposed on the printed circuit board <NUM>, the majority of the light is emitted toward the strip-shaped convex lens array <NUM>, but a minority part (small portion) of the lateral light is deflected away from the main beam and directed to other directions, and such light is often not utilized, so that the effective utilization rate of the light is reduced, which is a common problem in which the light source emits radiation in a radial manner. When the above design is adopted, it can make good use of the reflection effect to direct the deviated lateral light to the strip-shaped convex lens array <NUM>, thereby concentrating the light beam, and the luminous flux which is truly formed by the strip-shaped convex lens array <NUM> per unit area is more. Moreover, it improves the effective utilization of light, and reduces the number of point light sources <NUM> to reduce costs.

At the same time, in order to guide the deflecting light to the direction of the strip-shaped convex lens array <NUM> as much as possible, according to the light propagation path and the light radiation angle principle of the point light source <NUM>, in the embodiment, the reflection wall <NUM> and the printed circuit board <NUM> is disposed at an obtuse angle, and the specific angle is adjusted according to the distance between the point light source <NUM> and the strip-shaped convex lens array <NUM>.

As shown in <FIG> and <FIG>, the main components and positional relationship of the line source lighting system of this embodiment are the same as those of the first embodiment, except for the shape of the lens <NUM> and the connection manner of the respective members.

In this embodiment, the lens <NUM>, the reflection wall <NUM> and the strip bed plate <NUM> are integrally formed and enclosed to form an mounting cavity <NUM>. Extrusion process can be used for integral forming. The lens <NUM> adopts a symmetrical lens and has a radian change on both the inside and outside surfaces, which is easier to manufacture. In the mounting cavity <NUM>, a first mounting groove <NUM> for fixing the strip-shaped convex lens array <NUM> is disposed near the lens <NUM>, and the bottom portion of the mounting cavity <NUM> is provided a second mounting groove <NUM> for fixing the printed circuit board <NUM>, the side wall between the first mounting groove <NUM> and the second mounting groove <NUM> is the reflection wall <NUM>, and the reflection wall <NUM> is of the arc structure, so that the reflection angle is smaller and the efficiency is higher.

The strip base <NUM> is made of metal with better heat dissipation effect, and is provided with a curved mounting groove <NUM> for fixing the strip bed plate <NUM>. The bottom surface of the strip bed plate <NUM> is a curved surface that fits the curved mounting groove <NUM>, thereby improving the heat dissipation effect.

The strip-shaped convex lens array <NUM> of the present embodiment also employs an elliptical light diffusing film, and both sides in the width direction are inserted into the first mounting groove <NUM> for assembly.

As shown in <FIG> and <FIG>, the main components and positional relationship of the line source lighting system in this embodiment are the same as those of the first embodiment, except for the shape of the lens <NUM> and the connection manner of the respective members.

In this embodiment, the reflection wall <NUM> and the strip bed plate <NUM> are integrally formed. The inner side of the top of the two reflection walls <NUM> is provided with a first mounting groove <NUM> for fixing the strip-shaped convex lens array <NUM>, and the outer side of the top of the two reflection walls <NUM> is provided with a buckle structure for fixing the lens <NUM>, and a second mounting groove <NUM> for fixing the printed circuit board <NUM> is provided at the bottom of the strip bed plate <NUM>.

In this embodiment, the lens <NUM> is a polarizing lens for adjusting the light distribution of the point light source <NUM> on a plane (y-z plane) perpendicular to the length direction of the lamp holder. The viewing angle in the figure is that the light is polarized to the left.

As shown in <FIG>, except for the mounting, connecting and positional relationship of the strip-shaped convex lens array <NUM> and the lens <NUM>, the structure and the connection manner of the remaining components of the embodiment are the same as those of the first embodiment, and the strip-shaped convex lens array <NUM> and the lens <NUM> are integrated. The strip-shaped convex lens array <NUM> is formed on the exit surface of the lens <NUM>.

As shown in <FIG>, in the present embodiment, as in the fourth embodiment, the strip-shaped convex lens array <NUM> and the lens <NUM> are integrally molded.

The line source illumination lamp of the present embodiment comprises lamp holder <NUM>, printed circuit board <NUM>, a plurality of point light sources <NUM>, lens <NUM>, strip-shaped convex lens array <NUM>, and lamp cover <NUM>.

The lamp holder <NUM> comprises a first strip base <NUM> and a second strip base <NUM> which are separated by a partition fixing plate <NUM>. The circuit board <NUM> provided with the plurality of point light sources <NUM> is symmetrically arranged with two pieces, respectively mounted on the first strip base <NUM> and the second strip base <NUM>. Correspondingly, the lens <NUM> is provided with two symmetrical ones, which are respectively installed in the first strip base <NUM> and the second strip base <NUM>. The outer side of the first strip base <NUM> and the second strip base <NUM> are connected to the two sides of the lamp cover <NUM> through a clasp structure, and the outer side of the clasp structure <NUM> disposed on both sides of the lamp cover <NUM> is provided with a soft seal <NUM>. The soft seal <NUM> is interference fit with the inner side wall of the first strip base <NUM> and the second strip base <NUM>. In the embodiment, the soft seal <NUM> is provided with a serration <NUM> on a side toward the inner side wall of the strip bases. The serration <NUM> can increase the contact tightness between the soft seal <NUM> and the inner wall of the strip bases, thereby providing a good waterproof effect.

The lens <NUM> comprises a light transmission main part <NUM> for focusing the majority of the light of the point light source <NUM>, and a light transmission secondary part <NUM> disposed at a certain angle with one side of the light transmission main part <NUM> to guide the minority (small part) of the light of the point light source <NUM>.

The light transmission main part <NUM> projects most of the light to the distal end of the illuminated surface <NUM>, and the light transmission secondary part <NUM> directs a small part of the light to the proximal end of the illuminated surface <NUM>. On the plane perpendicular to the length direction of the lamp holder, the light incident surface of the light transmission secondary part <NUM> and the light incident surface of the light transmission main part <NUM> are straight lines, and the angle formed by the intersecting straight lines is <NUM>°~<NUM>°.

The light transmission secondary part <NUM> is far away from the point light source <NUM>, and the light incident surface is provided with a strip-shaped convex lens array <NUM>; the light transmission main part <NUM> is close to the point light source <NUM>. In order to improve the effect of presenting line light source, both the light incident surface and the light emitting surface are equipped with a strip-shaped convex lens array <NUM>.

As shown in <FIG>, in this embodiment, the lens <NUM> is located between the strip-shaped convex lens array <NUM> and the printed circuit board <NUM>, and the distance between the strip-shaped convex lens array <NUM> and the point light source <NUM> is increased to improve the imaging of the line light source. The shape of the lens <NUM> can be designed as needed, and can be a symmetric convex lens, a polarizing lens, or an anisotropic lens.

As shown in <FIG>, in this embodiment, the lens <NUM> is disposed between the strip-shaped convex lens array <NUM> and the printed circuit board <NUM>, and the strip-shaped convex lens array <NUM> is disposed as a lamp cover. In this embodiment, the strip-shaped convex lens array <NUM> is a curved surface in which the strip-shaped convex lens is curved in the longitudinal direction.

As shown in <FIG>, in this embodiment, the lens <NUM> is provided with two, and the strip-shaped convex lens array <NUM> is disposed between the two lenses <NUM>. The two lenses <NUM> can cooperate to achieve a higher light distribution. The shape of the lens <NUM> can be designed as needed, and can be a symmetric convex lens, a polarizing lens, or an anisotropic lens.

Claim 1:
A line source lighting system, comprising: a lamp holder (<NUM>);
a printed circuit board (<NUM>), disposed on the lamp holder (<NUM>);
a plurality of point light sources (<NUM>), disposed spaced apart from each other along the length direction of the lamp holder on a light source mounting surface of the printed circuit board (<NUM>);
at least one lens (<NUM>), disposed on the lamp holder (<NUM>) and located in a light-emitting direction of the point light source (<NUM>), configured to adjust the light distribution of the point light source (<NUM>) on a plane perpendicular to the length direction of the lamp holder;
a strip-shaped convex lens array (<NUM>), disposed on the lamp holder (<NUM>) and located in the light-emitting direction of the point light source (<NUM>) and arranged along the length direction of the lamp holder (<NUM>), configured to convert the light distribution of each point light source (<NUM>) into a linear light distribution as being emitted by a plurality of linear light sources,
wherein
the strip-shaped convex lens array (<NUM>) and the lens (<NUM>) are integrally formed;
the strip-shaped convex lens array (<NUM>) is disposed on a surface on which the light emitting surface of the lens (<NUM>) is located; characterized in that
the lens (<NUM>) comprises a light transmission main part (<NUM>) configured to focus a majority part of the light emitted by the point light source (<NUM>), and a light transmission secondary part (<NUM>) disposed at an angle which is <NUM>°-<NUM>° with one side of the light transmission main part (<NUM>) to guide a minority part of the light of the point light source (<NUM>),
wherein on a plane perpendicular to the length direction of the lamp holder, the light incident surface of the light transmission secondary part (<NUM>) and the light incident surface of the light transmission main part (<NUM>) are straight lines, and the angle is formed by the intersecting straight lines.