CN104344231A - Lighting device - Google Patents

Abstract

The invention relates to a lighting device, which comprises a lamp shell, an LED module and a lampshade, wherein the design of relevant parameters of the lampshade and the LED module is carried out through the following steps: the width of the lampshade, the height of the lamp and the light-emitting angle of the LED module enable the illumination output by the LED module to penetrate through the lampshade, and then the illumination uniformity of the surface of the lampshade of the illuminating device is more than 70%.

Description

lighting device

technical field

The present invention relates to a lighting device using LED as a light source, in particular to a lighting device.

Background technique

In view of the advantages of light emitting diode (Light Emitting Diode, LED) compared with traditional light bulbs, such as high brightness, power saving, environmental protection, long service life and small size, it is widely used in the lighting of lamps and lanterns. LED components are arranged and connected on a circuit board, and combined into an LED module, and then a plurality of LED modules are arranged in series or parallel to form an LED lighting device, so as to achieve the use requirements of large-scale illumination and high brightness, and used indoors Or outdoor lighting devices; however, LED lighting devices used in indoor lighting devices have a lack of brightness that is too concentrated and uneven in the center of the point. It must rely on secondary optical design to guide the amount of light to diffuse forward to an appropriate range in order to obtain the desired effect. Sufficient light quantity and light area illumination of the target, generally in the shape of a traditional light-transmitting mirror, concentrates the light of the LED light-emitting component, resulting in concentrated and intense light brightness of the LED lighting device.

The conventional LED lighting device is that when the LED component is output to the lampshade, a light-transmitting mirror is added to increase the irradiation angle of the light source. As disclosed in Taiwan's new patent certificate No. M379007, it is an LED lamp tube with a complementary light-diffusing structure. A circuit board is arranged in the LED lamp tube, and at least one LED component is arranged on the circuit board, and the inner wall of the lamp tube is provided with a plurality of linear convex structures. A light-diffusing sheet is arranged in the lamp tube, and the light-diffusing sheet is arranged below the irradiated surface of the LED assembly, so that the light emitted by the LED assembly first penetrates the light-diffusing sheet and then passes through the lamp tube. The light-diffusing sheet is light-transmitting, and at least one of its inner and outer two ends is provided with several protruding lines, so that the light emitted by the LED assembly is diffused twice after passing through the light-diffusing sheet and the lamp tube.

However, the conventional LED lighting device still has the following problems in actual use. Because the lamp tube and the light diffuser are made separately, not only the cost of setting up the mold for the component, but also considerable in terms of assembly and other manufacturing processes. In addition, the light source emitted by the LED component passes through the light diffuser and the lamp housing, which will cause two energy attenuation, and in response to the energy attenuation, the electric power of the LED component must be increased, and the temperature inside the tube cavity will also increase. increase, resulting in excess heat loss.

In addition, another kind of LED lighting lamp group is known. Before the light source of the LED module is output to the lampshade, a reflector is installed to convert the point light source of the LED module into a linear light source after one reflection, so as to improve the uniformity of the illumination of the LED module. , as disclosed in China Taiwan's new patent certificate number M413821, the reflective light-emitting diode lamp includes: a lamp tube, at least one substrate and at least one light-emitting diode. The lamp tube is a long circular body and includes a reflective shell and a light-transmitting cover. The reflective casing and the transparent cover are respectively a long semicircular body. The reflective housing has a reflective surface on the inner side. The transparent cover is a light diffusion sheet. The base plates are arranged in the lamp tube. The light emitting diodes are installed on the substrates, and the light emitting direction faces the reflective housing, and the light is reflected by the reflective surface of the reflective housing and then emitted from the light-transmitting cover. In this way, the light-emitting diodes, which were originally point light sources, can be transformed into line light sources by utilizing reflection to eliminate the characteristics of point light sources.

However, another kind of LED lighting lamps known in the art still has the following known problems in actual use. Since the LED module is placed on the back side above the light-emitting surface, it will receive the image of the LED module bottom plate, thereby reducing the output light source intensity. Furthermore, the reflective shell is a semicircular body. Due to the principle of light reflection, although another LED lighting group increases the angle at which the light source is emitted to the lampshade, the range of its output light source is still limited by the substrate of the LED module. , the intensity of the light source is concentrated near the center of the two substrates.

The illumination uniformity is defined as the ratio of the surface minimum illuminance value to the surface maximum illuminance value, and its range falls between 0 and 1, and 1 is an ideal value.

According to the above, the known devices that use LEDs as lighting are still limited to the angle of placement of the LED itself and the path of the light source in order to improve the uniformity of illumination, so that it can produce concentrated illumination through the mask, thereby resulting in output illumination. The uneven distribution of light and dark ratios, that is, poor lighting uniformity and bad taste; therefore, how to effectively solve the aforementioned problems has become an important research topic for relevant people in this industry.

Contents of the invention

The main purpose of the present invention is to provide a lighting device, which changes the ratio of the main body of the lamp housing and the extension, thereby improving the uniformity of illumination on the surface of the lampshade where the output of the lighting device is more than 70%, so as to improve the lampshade of the lighting device The uniformity of lighting on the surface.

The secondary object of the present invention is to provide a lighting device, which changes the angle of the light output of the LED module, thereby improving the uniformity of light on the surface of the lampshade where the output of the lighting device is more than 70%, so as to improve the surface of the lampshade of the lighting device. Uniformity of light.

Another object of the present invention is to provide an illuminating device, which horizontally arranges another illuminating device with an extension, thereby increasing the output light of the illuminating device.

Another object of the present invention is to provide an illuminating device, which changes the structure of the lampshade, thereby improving the uniformity of illumination on the surface of the lampshade.

In order to achieve the above-mentioned purposes and effects, the present invention provides a lighting device, which includes a lamp housing, an LED module and a lamp shade, the lamp housing has a body and an extension, wherein the body has a width , the extension has a height, the two are related to the setting of the lampshade, and the setting of the lampshade is adjusted in proportion, and the two also form a first space with the lampshade, and the light is output by the LED module. The path passes through the first space and is irradiated through the lampshade, so that the light output by the LED module passes through the lampshade to convert point illumination into uniform illumination, and the lighting device can provide more than 70% of the illumination on the surface of the lampshade Uniformity, when people use the lighting device, it can effectively reduce the concentration characteristic of the LED module itself, so as to improve the uniformity of illumination on the lampshade surface of the lighting device.

In addition, the LED module is arranged on the lamp housing and forms a first angle or a second angle with the lamp housing. The light output by the LED module forms a first light output path or a light output path in the first space. The second light output path and a reflected light output path are irradiated through the lampshade, so that the light output by the LED module passes through the lampshade to convert the LED point light source into a surface light source, and the lighting device can provide illumination to improve the surface of the lampshade Evenness.

In addition, the extension piece is horizontally symmetrically arranged to form another lighting device, and the LED module of the two lighting devices illuminates the light source and passes through the first space and the second space respectively to generate a symmetrical light path. In this way, the output light quantity of the lighting device is increased.

Furthermore, by changing the structure of the lampshade, doping a plurality of particles or a processed microstructure with surface treatment, after the lampshade receives the light output by the LED module, the particles or the processed microstructure guide the path of the light, which will Converts to uniform lighting for this shade's surface.

The beneficial effects of implementing the present invention are: the present invention can provide a light source with an illumination uniformity of more than 70% on the surface of the lampshade, and convert the light source from a point light source to a uniform surface light source. When people use the lighting device, the LED module itself can be effectively reduced. It has the characteristic of concentrating and improves the uneven distribution of light and dark of the lampshade, thereby overcoming the problems of poor uniformity of illumination and bad taste on the surface of the lampshade of the lighting device.

Description of drawings

FIG. 1 is a schematic structural view of a lighting device according to a first embodiment of the present invention;

Fig. 2A is a side view of the lighting device according to the first embodiment of the present invention;

Fig. 2B is a simulation data diagram of the uniformity of illumination on the surface of the lampshade according to the first embodiment of the present invention;

Fig. 3 is a simulation data diagram of the uniformity of illumination on the surface of the lampshade according to the first embodiment of the present invention;

Fig. 4 is a schematic diagram of the symmetrical structure of the lighting device according to the first embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a lighting device according to a second embodiment of the present invention;

Fig. 6 is a side view of a lighting device according to a second embodiment of the present invention;

Fig. 7 is a simulation data diagram of illumination uniformity in the second embodiment of the present invention;

Fig. 8 is a schematic diagram of a symmetrical structure of an illuminating device according to a second embodiment of the present invention;

FIG. 9A is a schematic structural view of a lampshade according to a third embodiment of the present invention; and

FIG. 9B is a schematic structural diagram of another lamp shade according to the third embodiment of the present invention.

[Description of drawing number comparison]

1 lighting device 2 lamp housing

21 Body 23 Extension

231 Accommodating part 3 Reflecting part

5 LED module 7 Lampshade

71 Particles 73 Microstructure

9 First Space 10 Second Space

o Observation point ml First measuring point

m2 second measuring point m3 third measuring point

d width h length

θ ₁ first angle θ ₂ second angle

Normal vector P ₁ first light path

P ₂ second light output path P ₃ reflected light path

Detailed ways

In order to make the structural features of the present invention and the achieved effects have a further understanding and recognition, preferred embodiments and detailed descriptions are specially used, which are described as follows:

The present invention aims at improving the poor uniformity of illumination on the surface of the lampshade 7 caused by the conventional LED device being limited by the light diffusion angle of the LED itself and the light source path derived from the light source path of the lampshade; therefore, how to effectively solve the aforementioned problems The problem is that the purpose of the present invention is to provide a lighting device that improves the brightness of the lampshade by setting different widths of the lampshade, or by setting the LED modules at different positions and angles, or by treating the surface of the lampshade. The distribution is uneven, thus overcoming the problems of poor illumination uniformity and bad taste on the surface of the lampshade 7 of the lighting device.

Please refer to FIG. 1 , which is a schematic structural diagram of a lighting device according to a first embodiment of the present invention. As shown in the figure, the present invention provides a lighting device 1 , which includes a lamp housing 2 , a reflector 3 , and an LED module 5 and a lampshade 7, wherein the lamp housing 2 is made of thermally conductive material, such as metal, glass, ceramic or thermally conductive plastic material, and the reflector 3 can be made of a metal material with good light reflection, or can be made of The reflector 3 can be made of any material. That is, the form of the reflector 3 is not limited, as long as it can reflect the light of the LED module 5 toward the direction of the lampshade 7, and the LED module 5 can be designed in any color, and a white LED module is used for illustration here. , so that in general lighting, it includes warm white or cool white light, that is, the color temperature is about 3000-7000K, and the material of the lampshade 7 includes PC, PMMA, PS, PET and other light-transmitting materials.

Please refer to FIG. 2A, which is a side view of the lighting device of the first embodiment of the present invention. As shown in the figure, the lamp housing 2 of the lighting device 1 of the present invention includes a body 21 and an extension 23, wherein the extension 23 has a housing part 231, one side of the body 21 is extended upwards to set the extension part 23, the housing part 231 is provided under the extension part 23, the body 21 and the extension part 23 are provided with the reflection 3, and the LED module 5 is arranged on the body 21, one side of the lampshade 7 is connected to the other side of the body 21, and the other side of the lampshade 7 is connected to one side of the extension 23, so that the lampshade 2 and the lampshade 7 surrounds a first space 9 formed.

Moreover, the accommodating part 231 places a power supply, and the power supply can be a switching type, a constant current type, etc., to provide stable input power for the LED module 5, which is not a technical feature of the present invention. I won't go into details.

Please refer to FIG. 3 , which is a simulation data diagram of the uniformity of illumination on the surface of the lampshade 7 according to the first embodiment of the present invention. The width d of the main body 21 is set to be 65-85 mm, and the height h of the extension 23 is set to be different. less than 35mm, to limit the ratio of the lamp housing 2 to the lampshade 7, a first light source path P ₁ of the LED module 5, a normal vector between the first light output path P ₁ and the body 21 A first angle θ ₁ is formed, the first angle θ ₁ is 35-90°, as shown in the figure, it is set correspondingly according to the width d of the body 21, and the width d is 65mm, 75mm and 85mm as follows For example, when the width d is 65mm, then the first angle θ ₁ should be set at 35-90°; when the width d is 75mm, then the first angle θ ₁ should be set at 40-90°; when the width d If it is 85mm, the first angle _θ1 should be set at 45-70°. After the illumination light source of the LED module 5 passes through the first space 9, it passes through the lampshade 7 to irradiate the illumination uniformity 70° on the surface of the lampshade 7. % above the light source, that is, to change the width d of the body 21, and then adjust the setting of the lampshade 7, wherein, the lower the ratio of the width d to the height h, the larger the LED module 5 is set. The range of angle _θ1 can provide a light source with an illumination uniformity of more than 70% on the surface of the lampshade 7, and convert the light source from a point light source to a uniform surface light source. When people use the lighting device 1, it can effectively reduce the concentration of the LED module 5 itself. characteristics, thereby improving the uneven distribution of brightness and darkness of the lampshade 7, thereby overcoming the problems of poor lighting uniformity and bad taste of the output of the lighting device.

Please refer to Fig. 2B, the illumination uniformity measurement method of the measuring device 1, select an observation point o to be set on the edge of the upper side of the lampshade 7, and set it at 1/6 of the width d from the observation point o , 1/2 and 5/6, set a first measurement point ml, a second measurement point m2 and a third measurement point m3 in sequence, and then measure the first measurement point ml, The surface minimum illuminance and surface maximum illuminance of the second measurement point m2 and the third measurement point m3 are used to calculate the illumination uniformity of the measuring device 1 by using the definition of illumination uniformity.

In order to make the LED module have a better light output relative to the lighting device, the present invention first designs a reflector so that the light of the LED module can reflect the lighting device as much as possible. Through this design, the light output of the lighting device can be improved. The wattage of the designed LED module, the heat dissipation of the main body and the extension can be reduced. Furthermore, the technical characteristics of the present invention: in order to achieve better light uniformity, the device is designed according to the width of the lamp and the angle of the LED module. The illumination uniformity on the surface of the lampshade 7 is more than 70%, to overcome the shortcomings of the point light source of the LED itself, so that it has the effect of a surface light source, and the parameters of the height and width of the lamp can be further set to make the uniformity even better. Effect.

Please refer to FIG. 4 , which is a schematic diagram of the symmetrical structure of the lighting device according to the first embodiment of the present invention. It is arranged to form another lighting device, which has the same structure as the above lighting device, and is provided with a second space 10, so that the lighting device 1 can provide multi-angle illumination, thereby increasing the light output of the lighting device 1 .

Please refer to FIG. 5 , which is a schematic structural diagram of the lighting device of the second embodiment of the present invention. As shown in the figure, another preferred embodiment of the lighting device of the present invention is to set the LED module 5 on the extension 23 , and change its light source path to make it pass through the reflection, and use the direct lighting method to improve the poor uniformity of the output light and the problem of bad taste, so as to make full use of the reflector 3 as a technology to improve the uniformity of light Means, and through the design of reflective lighting angle and the parameters of the width and height of the lamp, the lighting device has better uniformity, as explained below.

Please refer to FIG. 6 , which is a side view of the lighting device according to the second embodiment of the present invention. As shown in the figure, please refer to the second figure for the structural connection between the reflector 3 and the lamp housing 2 , so no further description is given.

Please refer to FIG. 7, set the width d of the main body 21 to 65-85mm, and set the height h of the extension 23 to not less than 35mm, so as to limit the ratio of the lamp housing 2 to the lampshade 7, and the output of the LED module 5 The light source path is different. The light source irradiated by the LED module 5 passes through the first space 9 to generate a second light output path P ₂ , and the second light output path P ₂ forms a second included angle θ ₂ with the extension 23 , the second included angle: θ ₂ is 0-80°, as shown in the figure, it is set correspondingly according to the width d of the body 21, the following takes the width d as 65mm, 75mm and 85mm as examples, when the width d is 65mm, then the second angle θ ₂ should be set at 0-50°; when the width d is 75mm, then the second angle θ ₂ should be set at 0-50°; when the width d is 85mm, the first The second angle θ ₂ should be set at 0-80°, and then a third reflected light path P ₃ is generated by the reflection of the reflector 3, passing through the lampshade 7 to provide an illumination uniformity of more than 70% on the surface of the lampshade 7, That is to change the second angle θ ₂ of the LED module 5 on the lamp housing 7 so that it illuminates the reflector 3 first, changing the original first light output path P ₁ to the second light output path P ₂ , and after the reflection 3 to change the original point light source into a surface light source, and then adjust the ratio of the lamp housing 2 and the lampshade 7 according to the width of the body 21, so that the third light output path _P3 passes through the lampshade 7, wherein, Change the width d of the main body 21, and fix the height h of the extension 23 to not less than 35 mm, and then adjust the setting of the lampshade 7. The higher the ratio of the width d to the height h, the larger the LED module The interval of the second angle _θ2 set by 5 can provide a light source with an illumination uniformity of more than 70%. The light source irradiated by the LED module 5 is converted from a point light source into a uniform surface light source after being reflected by the reflector 3. People use The lighting device 1 can effectively reduce the concentration of the LED module 5 itself, thereby improving the uneven distribution of light and dark of the lampshade 7, thereby overcoming the problems of poor uniformity of illumination and bad taste on the surface of the lampshade 7.

Please refer to FIG. 8 , which is a schematic diagram of the symmetrical structure of the lighting device according to the first embodiment of the present invention. It is arranged to form another lighting device, which has the same structure as the above lighting device, and is provided with a second space 10, so that the lighting device 1 can provide multi-angle illumination, thereby increasing the light output of the lighting device 1 . Please refer to FIG. 9A and FIG. 9B first, which are structural schematic diagrams of the lampshade and another lampshade of the lighting device according to the third embodiment of the present invention. As shown in the figure, the structure of the lampshade 7 is doped by surface treatment. A plurality of particles 71 or a microstructure 73 is processed.

Please refer to FIG. 1 and FIG. 5 together. As shown in the figure, the structural connection relationship is the same as that in FIG. 2A or FIG. 6 , so details are not repeated here.

Furthermore, the LED module is arranged on the lamp housing 2. By changing the path of the output light source of the LED module 5, the light source output by the LED module 5 is guided by the particles 71 or the structure 73, and the light source is changed from The irradiation direction of the original light source from the first light source path _P1 or the second light output path _P2 to the lampshade 7 makes the point light source of the LED module 5 a surface light source. The module 5 itself has the characteristics of concentration, thereby improving the uneven distribution of light and shade of the lampshade 7, thereby overcoming the problem of poor uniformity of illumination and bad taste on the surface of the lampshade 7 output by the lighting device.

To sum up, the present invention relates to a lighting device, which provides a LED module 5 arranged on the lamp housing 2 at an angle with the lamp housing 2, and the light source of the LED module 5 directly irradiates the lamp housing 7 Or reflect to the lampshade through the reflector, and change the light source path inside the lighting device 1 by setting the width of the main body and the height condition of the extension piece, and change the light source path inside the LED module 5 according to the above-mentioned lighting fixture 1. Form another lighting fixture with horizontal symmetry of the extension to increase the amount of light output by the lighting device 1: or to change the angle of the output light of the LED module 5, so that the LED module directly illuminates the reflector 3, so that the reflector 3 reflects The point light source is converted into a surface light source. In addition, by adding the particles 71 or the structure 73 of the lampshade 7, the light source output by the LED module 5 is guided by the particles 71 or the structure 73, thereby changing the irradiation direction of the light source. Therefore, the first to third embodiments all make the point light source of the LED module 5 a surface light source. When people use the lighting device 1, it can effectively reduce the concentration of the LED module 5 itself, thereby improving the brightness of the lampshade 7. The distribution is uneven, thus overcoming the problems of poor illumination uniformity and bad taste on the surface of the lampshade 7 of the lighting device.

The above is only a preferred embodiment of the present invention, and is not intended to limit the implementation scope of the present invention. All equivalent changes and modifications made in accordance with the shape, structure, characteristics and spirit described in the scope of the claims of the present invention shall be included in the scope of the claims of the present invention.

Claims (10)

1. a lighting device, is characterized in that, comprises:

One lamp housing, it comprises a body, a side upwards extended extension of this body;

One LED module, it is arranged on this lamp housing; And

One lampshade, the side of this lampshade connects the opposite side of this body, and the opposite side of this lampshade connects the side of this extension, and the width of this lampshade is 65-85mm, makes this LED module be more than 70% through its uniform illumination degree after this lampshade.

2. lighting device as claimed in claim 1, it is characterized in that, wherein this LED module is arranged on this body.

3. lighting device as claimed in claim 1, it is characterized in that, wherein this LED module is arranged on this extension.

4. lighting device as claimed in claim 2, it is characterized in that, wherein one first normal line vector going out light path and this body of this LED module forms one first angle is 35-90 °.

5. lighting device as claimed in claim 3, is characterized in that, wherein one second of this LED module goes out light path and this extension to form one second angle be 0-80 °.

6. lighting device as claimed in claim 1, it is characterized in that, wherein the height of this extension is not less than 35mm.

7. lighting device as claimed in claim 1, it is characterized in that, wherein this body and this extension arrange a reflecting element, this reflecting element reflexes to outside lampshade with the light this module sent.

8. lighting device as claimed in claim 1, it is characterized in that, wherein this extension has an accommodating member.

9. lighting device as claimed in claim 8, it is characterized in that, wherein this lighting device arranges another lighting device in the horizontal symmetrical of this accommodating member.

10. lighting device as claimed in claim 1, is characterized in that, wherein this cover surface process can be adulterated multiple particle or processing one micro-structural.