CN215335984U

CN215335984U - Lighting device

Info

Publication number: CN215335984U
Application number: CN202121899098.0U
Authority: CN
Inventors: 王浩; 张飞; 李芹; 郭阳
Original assignee: Andon Health Co Ltd
Current assignee: Andon Health Co Ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2021-12-28
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses a lighting device, which comprises a lamp holder and a lamp body, wherein the lamp body comprises a lampshade, a bracket, a light source and an integrated lens, wherein the bracket, the light source and the integrated lens are arranged in the lampshade, and the lamp body comprises: the lamp holder is used for supporting the lampshade; a light outlet is formed at the front part of the lampshade; the bracket is arranged on the rear side inside the lampshade; the light source is fixed on the bracket; the integrated lens is fixed between the light source and the light outlet and close to the light source, and is used for arranging the light type of visible light emitted by the light source and controlling the light outlet direction, and the arranged and controlled visible light irradiates a receiving surface after passing through the light outlet; at least one of the light incident surface and the light emergent surface of the integral lens is a free-form surface in each direction. The device carries out accurate control through integral type lens to the light, arranges the light type and controls luminous direction, redistributes the light energy of light source, utilizes less structure to realize the illumination on a large scale, and the device is small, is convenient for install and carry.

Description

Lighting device

Technical Field

The utility model relates to the field of illumination, in particular to an illumination device.

Background

For desktop or keyboard illumination with a desktop or laptop display, a typical desk lamp not only needs to occupy limited desktop space, but also is prone to cause screen glare, which seriously affects user experience. To solve this problem, an illumination device placed on a computer monitor has been developed, and the illumination area and the uniformity of illuminance within the illumination area are important indicators of the illumination device for the monitor.

The lighting device for the display on the market at present is simpler in light control, so that the lighting area along the screen direction is directly related to the length of the lamp, and the longer the lamp is, the larger the lighting area along the screen direction is. In order to obtain sufficient lighting area, the length of the lamps in the market is generally 25-50cm, and the length and the volume are large, so that the lamps occupy large space, are heavy, and are inconvenient to miniaturize and arrange and portable.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides the lighting device with smaller length and volume under the same lighting area. The miniaturization of the lighting device and the flexible design of the support thereof can be applied to the illumination of a plurality of use scenes such as a desktop, a desktop bookshelf, a high position of an operation table, a top of a display table, a bed head and the like.

Therefore, the utility model adopts the following technical scheme:

the utility model provides a lighting device, includes lighting fixture and lamp body, the lamp body includes the lamp shade and installs support, light source and the integral type lens in this lamp shade, wherein: the lamp holder is used for supporting the lampshade; a light outlet is formed at the front part of the lampshade; the bracket is arranged on the rear side inside the lampshade; the light source is fixed on the bracket; the integrated lens is fixed between the light source and the light outlet and close to the light source, and is used for arranging the light type of visible light emitted by the light source and controlling the light outlet direction, and the arranged and controlled visible light irradiates a receiving surface after passing through the light outlet; at least one of the light incident surface and the light emergent surface of the integral lens is a free-form surface in each direction.

Preferably, the light source is provided in plurality, and the unitary lens includes a plurality of lenslets, each lenslet corresponding to a light source.

The curvature of the free curved surface is in continuous transition, so that the shape of a light spot on a receiving surface is approximate to a quadrangle after light rays emitted by the light source pass through the free curved surface.

Preferably, the shape of the light exit port is adapted to the profile of the exit light from the integral lens.

Preferably, the lamp holder is a flexible lamp holder for adjusting the height, distance and angle of the lampshade relative to the receiving surface; or the lamp shade can rotate relative to the receiving surface to adjust the angle of the emergent light.

The light source is an LED; the lampshade is an opaque metal or plastic lampshade; the material of the lens can be glass, polymethyl methacrylate, polycarbonate or polystyrene. The support is a metal aluminum substrate support.

The length of the lampshade can be as small as 2 cm.

Preferably, the lampshade is a horizontal cylindrical shell with two closed ends and an open front.

In one embodiment of the present invention, one of the light incident surface and the light emitting surface of the unitary lens is a flat surface, and the other surface is a free-form surface in each direction.

In another embodiment of the present invention, each direction of the light exit surface and the light entrance surface of the unitary lens is a free-form surface.

The illumination device of the present invention, when mounted on top of a display, provides the basic illumination function for users working and studying in front of the display.

When the lighting device is arranged at other positions, the lighting device can provide quadrilateral uniform illumination for the area below the lighting device by using a smaller structure.

Compared with the prior art, it has following beneficial effect:

1. the integrated lens is used for accurately controlling light, finishing the light type and controlling the light emitting direction, redistributing the light energy of the light source and realizing the illumination in a larger range by using a smaller structure;

2. the shape of the desktop irradiated by the light of the light source is arranged into a quadrangle through the integrated lens, the length along the display direction is larger than the length vertical to the display direction, and the illumination length along the display direction is larger than 70cm on the desktop at a distance of about 40 cm;

3. when the lighting device is arranged on a display on a desktop, the emergent light of the lamp is uniform in illumination in an illumination area in front of the display, and only the desktop is illuminated without illuminating the display, so that a high-quality illumination environment is provided for a user during working and learning in front of the display, and the light utilization rate is improved;

4. the lighting device is small in size, convenient to install and carry and capable of improving the use experience of a user.

Drawings

Fig. 1 is a schematic view of the installation position of the lighting device of the present invention in an application scene;

FIG. 2 is a schematic cross-sectional view of the lighting device of the present invention;

FIG. 3 is a schematic structural view of one embodiment of an integral lens in the lighting device of the present invention;

FIG. 4 is a schematic structural view of another embodiment of a unitary lens in the lighting device of the present invention;

FIGS. 5-7 are schematic diagrams of three structures of the light incident surface and the light emitting surface of the integrated lens in the illumination device according to the utility model;

FIG. 8 is a schematic diagram of a free form surface construction process of the present invention;

FIG. 9 is a light spot shape of one embodiment of the illumination device of the present invention at a distance of 40cm from the tabletop;

fig. 10 is a graph of the illumination of an embodiment of the lighting device of the present invention at a distance of 40cm from the table top.

Detailed Description

The structure of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 shows an application scenario of the lighting device of the present invention, in which the lighting device is installed above a display 2, and the lighting device includes a lamp holder 3 and a lamp body 1.

Referring to fig. 2, the lamp body includes a lamp housing 13, and a holder 15, a light source 11 and an integral lens 12 installed in the lamp housing 13, wherein: the lamp holder is used for supporting the lampshade. A light outlet 16 is formed at the front part of the lampshade 13; the bracket 15 is arranged at the rear side inside the lampshade 13; the light source 11 is fixed on the bracket 15; the integrated lens 12 is fixed between the light source 11 and the light outlet through a positioning column 14 on a frame 17 of the integrated lens and is close to the light source 11, and is used for arranging the light type of visible light emitted by the light source 11 and controlling the light outlet direction, and the arranged and controlled visible light irradiates a receiving surface after passing through the light outlet 16; at least one of the light incident surface and the light emitting surface of the integral lens 12 is a free-form surface in each direction.

According to actual needs, the light source 11 can be provided in plurality. Accordingly, the unitary lens 12 may include a plurality of lenslets, with each lenslet corresponding to a light source. The structure of the unitary lens 12 is shown in fig. 3 and 4.

The shape of the light outlet 16 can be adapted to the profile of the outgoing light from the integral lens 12.

Although the utility model has not been described with respect to specific structures of the lamp holder, it will be appreciated that the design requirements of the utility model can be met with lamp holders of existing structures. For example, the lamp holder 3 is preferably a flexible lamp holder for adjusting the height, distance and angle of the lamp housing 13 with respect to the receiving surface. Alternatively, the lamp cover 13 can rotate relative to the receiving surface to adjust the angle of the emitted light. In addition, by adopting a proper lamp holder, the lamp shade can be fixed at any required position, and the illumination of a target area is conveniently realized.

The light source 11 is an LED; the lampshade 13 is an opaque metal or plastic lampshade; the lens 12 and the frame 17 are made of glass, polymethyl methacrylate, polycarbonate or polystyrene; the length of the lampshade 13 can be as small as 2 cm; the support 15 is a metal aluminum substrate support.

In the embodiment shown in fig. 1, the lamp housing 13 is a horizontal cylindrical housing with both ends closed and a front opening. In practical applications, the shape of the lamp housing 13 may be designed according to specific requirements.

Referring to fig. 5 and 6, one of the light incident surface and the light emitting surface of the integral lens 12 may be a plane, and the other surface may be a free-form surface in each direction. As shown in fig. 7, each direction of the light exit surface and the light entrance surface of the unitary lens 12 may be a free-form surface.

The curvature of the free-form surface of the unitary lens 12 transitions continuously. Referring to fig. 2 and 8, the free-form surface is constructed as follows:

step 1: a central point of the light source 11 is used as a coordinate origin O, a plane where a light emitting surface of the light source 11 is located is an XOY plane, a direction passing through the coordinate origin O and perpendicular to the XOY plane is used as a Z axis, and a space Cartesian coordinate system is established.

Step 2: according to the law of conservation of energy, phi is the included angle between the light emitted by the light source 11 and the Y axis, theta is the included angle between the plane where the light emitted by the light source 11 and the Y axis are located and the Z axis, and the light source 11 is divided into m multiplied by n parts according to the equal luminous flux of a spatial solid angle to obtain (theta_i,φ_j) Wherein i is 1,2,3, … …, m; j is 1,2,3, … …, n.

Step 2: the irradiation surface of the quadrangular target is divided into m × n parts by equal area according to the distance H between the target surface and the light source 11 and the size of the quadrangular target area to obtain (x)_i,y_jH), wherein i ═ 1,2, … …, m; j is 1,2, … …, n; based on the principle of edge optics in non-imaging optics and establishing the light source 11Correspondence (theta) of light rays to points on the target surface in the coordinate system space_m,φ_n)→(x_m,y_n,H)。

And step 3: selecting the light (theta) emitted by the light source 11₀,φ₀) As the initial position, according to the height h of the lens in the direction and the initial position (x) on the target plane corresponding to the lens₀,y₀H) to obtain an initial point a on the lens₀₀Vector I of incident light₀₀And the vector O of the reflected light after passing through the lens surface₀₀According to the refractive index n of the lens, and the vector form of Snell's law: [1+ n ]²-2n(O·I)]^1/2N-O-nI, the normal vector N of that point on the lens surface can be determined₀₀So as to obtain a tangent plane B of the point₀₀. With light (theta) emitted by the light source 11₁,φ₀) And B₀₀As a second point A on the lens₁₀According to a second light (theta) of the light source 11₁,φ₀) And its corresponding initial position on the target plane is (x)₁,y₀H), and the vector form of Snell's law, repeating the above steps to obtain a tangent plane B to a second point of the lens in that direction₁₀. Repeating the above steps to obtain all points of the lens in the direction: a. the₀₀，A₁₀，A₂₀，……。

And 4, step 4: in the other directions, the above steps are repeated to obtain points on the lens surface in all directions:

A₀₀，A₀₁，A₀₂，……，A_0n

A₁₀，A₁₁，A₁₂，……，A_1n

……

A_m0，A_m1，A_m2，……，A_mn

and 5: and fitting according to the points in all directions on the surface of the lens to finally obtain the free-form surface of the lens.

In one embodiment of the utility model, the lens shown in fig. 4 is used, the length of the lens is about 4cm, the width of the lens is about 0.7cm, the shape of a light spot formed when the lens is 40cm away from the desktop is shown in fig. 9, the length of the light spot is about 70cm, and the width of the light spot is about 45 cm; the corresponding illuminance is relatively uniform as shown in fig. 10.

Claims

1. The utility model provides a lighting device, includes lighting fixture and lamp body, its characterized in that: the lamp body includes lamp shade (13) and installs support (15), light source (11) and integral type lens (12) in this lamp shade (13), wherein:

the lamp holder is used for supporting the lampshade;

a light outlet (16) is formed in the front of the lampshade (13);

the bracket (15) is arranged at the rear side inside the lampshade (13);

the light source (11) is fixed on the bracket (15);

the integrated lens (12) is fixed between the light source (11) and the light outlet and close to the light source (11), and is used for sorting the light type of visible light emitted by the light source (11) and controlling the light outlet direction, and the sorted and controlled visible light irradiates a receiving surface after passing through the light outlet (16);

at least one of the light incident surface and the light emergent surface of the integral lens (12) is a free-form surface in each direction.

2. A lighting device as recited in claim 1, wherein: the light source (11) is provided in plurality, and the integral lens (12) comprises a plurality of small lenses, and each small lens corresponds to one light source.

3. A lighting device as recited in claim 2, wherein: the curvature of the free curved surface is in continuous transition, so that the shape of a light spot on a receiving surface is approximate to a quadrangle after the light emitted by the light source (11) passes through the free curved surface.

4. A lighting device as recited in claim 3, wherein: the shape of the light outlet is adapted to the outline of the emergent light of the integral lens (12).

5. A lighting device as recited in any one of claims 1-4, wherein: the lamp holder (3) is a flexible lamp holder and is used for adjusting the height, distance and angle of the lampshade (13) relative to the receiving surface; or the lampshade (13) can rotate relative to the receiving surface to adjust the angle of the emergent light.

6. A lighting device as recited in claim 1, wherein: the light source (11) is an LED; the lampshade (13) is an opaque metal or plastic lampshade; the lens (12) is made of glass, polymethyl methacrylate, polycarbonate or polystyrene; the length of the lampshade (13) is more than or equal to 2 cm; the support (15) is a metal aluminum substrate support.

7. A lighting device as recited in claim 1, wherein: the lampshade (13) is a horizontal cylindrical shell with two closed ends and an opening front part.

8. A lighting device as recited in claim 1, wherein: in the light incident surface and the light emergent surface of the integral lens (12), one surface is a plane, and the other surface is a free-form surface in each direction.

9. A lighting device as recited in claim 1, wherein: each direction of the light emergent surface and the light incident surface of the integral lens (12) is a free-form surface.