WO2011091615A1

WO2011091615A1 - Regulation type light source device

Info

Publication number: WO2011091615A1
Application number: PCT/CN2010/070698
Authority: WO
Inventors: 秦厚敬
Original assignee: Qin Houjing
Priority date: 2010-01-31
Filing date: 2010-02-21
Publication date: 2011-08-04
Also published as: CN101718407A

Abstract

A regulation type light source device includes a linear light source configured by arranging LED chips (20). At least one light guide column (30) is provided beside the linear light source. One side of the light guide column is a light receiving surface (32) and another side is a light emitting surface (31). The light source device has continuous light distribution and does not generate glare.

Description

Adjustable light source device

The invention relates to an adjustment type light source device, in particular to a plurality of illuminations

An adjustment type light source device comprising a pole tube and a columnar light guide.

Background technique

At present, the lighting fixtures used in the market, such as fluorescent lamps, tungsten lamps, and energy-saving bulbs currently accepted by the public, have been widely used in daily life. However, such lighting fixtures have fast light attenuation, high energy consumption, high heat generation, short service life, easy breakage, and difficulty in recycling, and the conventional fluorescent lamps have poor color rendering properties, and the current is unstable and is likely to cause flicker. The combination of Light Emitting Diode (LED) lighting fixtures that have emerged in the past decade has overcome the above drawbacks to some extent. However, the combined LED lighting fixture is composed of a multi-point light source, and when the multi-point light source directly illuminates the object, the light emitted by the soft reflection of the lampshade is easy to cause multiple shadows on the illuminated object, thereby causing glare. The situation and multiple shadows occur. In addition, there is also a high-power LED with a light guide column structure, so that the high-power LED is illuminated toward the left and right ends of the light guide column, so that the light guide column is entirely illuminated, resulting in a relatively large area of soft light. However, the change of the light pattern emitted by this structural design is monotonous, which is not enough for various applications, and the heat generated per unit area of the high-power light-emitting diode is large, and the heat source generated after long-time illumination is easily accumulated. As a result, the temperature of the high-power LED will gradually increase with time, so that the illumination efficiency of the light guide column is not due to heat dissipation. The power is reduced, so there is still much room for improvement in this structural design. Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to overcome the above-mentioned drawbacks of the conventional LED light source, and to provide an adjustment type light source device having continuous light distribution without glare, good heat dissipation effect, wide application range, and high light utilization efficiency.

The object of the invention is achieved by the following technical solutions:

The utility model comprises a linear light source (LED light source) which is arranged by arranging light-emitting diode chips, wherein at least one columnar light guide body is arranged in the vicinity of the linear light source, wherein one side of the columnar light guide body is a light receiving surface, and the other side is a light emitting surface. . In use, the light emitted by the point source of the plurality of LED chips illuminates the light-receiving surface side of the columnar light guide body, and the light-receiving surface enters the columnar light guide body, and the light source is refracted through the surface of the columnar light guide body and the air interface, and the vertical direction thereof The light in the axial direction of the columnar light guide can condense and illuminate the light source through the surface of the columnar light guide body, and the light entering the columnar light guide body parallel to the axial direction has no curvature change on the surface, and does not aggregate and the main weight The effect of the continuous stacking is that the refracted light is emitted through the light-emitting surface of the columnar light guide body to form a uniform surface light source.

The following is a preferred embodiment of the improvement: the distance between the columnar light guide and the LED chip is 5 mm.

The columnar light guide has an arc shape in cross section. The LED chip is placed on its surface, that is, its focal plane, and the target object is irradiated on the front plane to form a strip-shaped illumination area. Moreover, the distance between the columnar light guide and the LED chip can be finely adjusted to generate a defocus phenomenon to expand the strip illumination area. When the distance between the columnar light guide and the LED chip is greater than 5 mm, the proportion of the light emitted from the light emitting diode chip outside the light receiving surface is high, and about 30% of the light will not enter the column shape. The light guide body is therefore not suitable for high-efficiency illumination, so the distance between the columnar light guide and the LED chip is preferably 5 mm. Excessive defocus adjustment method is not recommended, and then the cross-sectional shapes of various light guide columns are developed to complete the adjustment methods of different wide-width and different uniform strip light sources.

The columnar light guide has an arc shape in cross section. According to the Lens Maker's Formula, the focus is equal to the radius of the arc, that is, the arc surface is the focal plane. Although the circular cross section of the cylindrical light guide body is often used, the effect of focusing imaging is quite distorted, but it is advantageous for the purpose of uniform illumination. When the LED chip is placed close to the surface of the arc, that is, placed at the focus, only the component perpendicular to the axial direction is concentrated by the arc section, and a uniformly projected surface light source is formed, and then projected on the front plane target. A strip of illuminated area. Because the traditional luminaire uses the design of the reflector behind the light source to soften, concentrate or directionalize the light distribution in the illumination area, the characteristics of the LED light source that is emitted forward are completely unsuitable, so it must be between the LED light source and the target. That is, the addition of additional optical components in front of the LED light source or changing the characteristics of the cylindrical light guide refractive refraction to adjust the distribution of its optical domain can meet the needs of different illumination purposes.

The application of the invention can also change the position of the majority of the LED chips relative to each other to adjust the light distribution, that is, the direction of the chip and the axial deflection of the columnar light guide are at an angle Θ, taking the vehicle headlight as an example, in order to avoid the illumination of the oncoming vehicle. For the safety of the country, the country on the right side requires that the headlights should be illuminated: the left side has a low light pressure, and the right side of the light rises 15° after passing the center line. One embodiment of the present invention is that, in the placement position of the LED chip, the direction of the alignment of the LED chip is inclined at an angle after the alignment of the central chip, and the overall light projection effect can satisfy the light distribution required by the automobile headlight. There is no need to change the design of the mechanism or use complex optical reflector accessories to easily achieve the desired light distribution, save space and improve light efficiency. The invention can also add a columnar light guide body in parallel with the axial direction in front of the light-emitting surface of the columnar light guide body, and when the additional columnar light guide body is two groups, the width of the band-shaped illumination area can be smoothly expanded by about three times. However, only the light distribution is not uniform, and the central band has a high brightness, so it is only suitable for some lighting applications.

When the columnar light guide has a polygonal cross section, different intensity and angle distributions can be obtained, and the light distribution is suitable for use in street lighting with different heights, and the structure of the combination of polygonal and cylindrical light guides can be used. Various light distributions are formulated to suit different lighting needs.

The linear light source formed by arranging the light emitting diode chips may be parallel or skewed to the axial direction or a combination thereof.

The columnar light guiding body may be a hollow tubular shape, which causes the light to undergo a multi-folding and reflection effect, and greatly enlarges the exit angle of the light-emitting surface, and the angle of the light-emitting surface is up to 150°, and the inner diameter of the hollow tube can be adjusted to determine the uniformity of the light distribution. Sex. Since the manufacture of the hollow tube and the manufacture of the light guide column can use the same mold, the parallelism is excellent, and the light quality and cost have great market potential.

The columnar light guide body has a hollow tubular structure, and an axially rotatable refractive component is further disposed in the tube for the user to rotate and adjust the light distribution of the light emitting surface exit angle.

The invention converts the point light source generated by the plurality of light-emitting diodes into a uniform surface light source through the columnar light guide body, and can guide the surface light source to the area to be illuminated, thereby preventing glare phenomenon and multiple shadows generated by the multi-point light source. The situation happened.

In addition, the LED chip is dispersed in a plurality of small chip strings and parallel circuits, and the chip is directly fixed on a large substrate having a heat dissipation function, the heat source of the LED is dispersed, and the substrate has a large heat dissipation rate, thereby improving the illumination. Diode overall heat dissipation The effect is to prevent the heat source from hoarding at a fixed place, thereby making the overall electro-optical conversion efficiency of the light-emitting diode better.

DRAWINGS

1 is a schematic perspective view of a first embodiment of the present invention.

Figure 2 is a schematic cross-sectional view of the embodiment of Figure 1.

Fig. 3 is a schematic structural view of Embodiment 2 of the present invention.

4 is a schematic structural view of Embodiment 3 of the present invention.

Fig. 5 is a schematic structural view of Embodiment 4 of the present invention.

Figure 6 is a schematic view showing the structure of a fifth embodiment of the present invention.

Figure 7 is a schematic structural view of Embodiment 6 of the present invention.

Figure 8 is a schematic view showing the structure of Embodiment 7 of the present invention.

Figure 9 is a perspective view showing the appearance of the eighth embodiment of the present invention.

Figure 10 is a schematic view of the embodiment 8 shown in Figure 9 before adjusting the reflection angle.

Figure 11 is a schematic view of the embodiment 8 shown in Figure 9 after adjusting the reflection angle.

detailed description

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

Example 1

Referring to FIG. 1 and FIG. 2, the present embodiment includes a linear light source formed by arranging LED chips 20, a columnar light guide 30 is disposed adjacent to the linear light source, and the columnar light guide 30 is a light receiving surface 31. The other side is the light emitting surface 32.

The plurality of point light sources formed by the LED chip 20 are irradiated onto the columnar light guide 30, and the plurality of point light sources enter the columnar light guide body 30 from the light receiving surface 31, and the light source passes through the columnar light guide. The body 30 is refracted and is emitted by the light emitting surface 32.

The columnar light guide body 30 is made of a transparent material having a light transmission. When the plurality of point light sources generated by the plurality of light emitting diode chips 20 are irradiated toward the light receiving surface 31 of the columnar light guide body 30, the light source can be converted from the air medium into the columnar light guide. The body 30 medium condenses and refracts the light source through the solid columnar light guide 30, and emits the refracted light source through the light emitting surface 32 of the columnar light guide 30. Since the columnar light guide body 30 has an arc shape in cross section, the refracting light source is irradiated by the uniform surface light source in which the light emitting surface 32 is radiated. With this structural design, the point light source emitted from the plurality of LED chips 20 can be converted into a uniform surface light source through the columnar light guide 30, and the surface light source can be guided to the illumination area.

In addition, the plurality of LED chips 20 can be illuminated by various colors, and the user can first configure the required spectrum, so that the plurality of LED chips 20 are irradiated to the columnar light guide body 30, and then light sources of various hue and color temperatures are illuminated.

Furthermore, the plurality of LED chips 20 are electrically connected to the substrate 10 for linear dispersion, and the substrate 10 is used as a control circuit for the plurality of LED chips 20 and simultaneously provides heat dissipation, so that the heat source can be prevented from being accumulated at the fixed position, thereby improving the present. There are techniques that use high power LEDs to create problems with poor heat dissipation. In addition, the series of LEDs of the plurality of LED chips 20 can be completely matched with the layout of the control circuit, and can be applied to various high and low voltage or AC/DC power supply driving, wherein 36 groups are connected in series, and the normal working voltage can be up to 36 X 3. 5V=126V, the peak working voltage can be as high as 36 X 4. 5V=162V. According to this series connection, the second group can be reversely connected in parallel. When the AC110V power supply can be directly used, the structure design is omitted. The need for additional power distribution is the advantage of this multi-chip system and the mainstream application in the future. In this way, the plurality of LED chips 20 can select a suitable number of chip series and parallel control circuits according to the power supply status of the user's location, and can fully cooperate with the local DC or AC power supply as a power source, so that the present invention has a wider application range.

Example 2

Referring to FIG. 3, the structure of the embodiment is characterized in that the illumination range of the headlight of the automobile is "left low and right high", and the cylindrical light guide body 30 forms a focal plane on the outer surface thereof, that is, the direction of the LED chip and the columnar light guide body. The axial deflection is at an angle Θ. In order to avoid the impact of the illumination on the vehicle, the headlights are required to meet the requirements of the vehicle on the right side of the vehicle. The left side of the light is low, over the central line. The rear right side of the light rises at 15 °. In this embodiment, the placement position of the LED chip is inclined at an angle after the center chip is arranged, and θ = 15 °, the overall light projection effect can satisfy the light distribution required by the automobile headlight, completely No need to change the mechanism design or use complex optical reflector accessories, you can easily get the required light distribution, and save space; changing the orientation of the chip arrangement near the focal plane can directly change the direction of the light source.

Example 3

Referring to Fig. 4, the structure of this embodiment is substantially the same as that of Embodiment 1, except that the plurality of columnar light guides 30 are arranged in a stack so that the plurality of columnar light guides 30 exhibit the largest light source irradiation area.

Example 4

Referring to Fig. 5, the structure of this embodiment is substantially the same as that of the first embodiment, except that the columnar light guide body 30 has a polygonal cross section, thereby exhibiting uniform surface light source illumination in one direction or more. Example 5

Referring to Fig. 6, the structure of this embodiment is also substantially the same as that of the first embodiment, except that the columnar light guide body 30 is made of a hollow material having light transmission, the columnar light guide body 30 has a cavity 33, and the columnar light guide body 30 is provided. The cavity 33 has an arc shape in cross section. When the light source enters the medium of the columnar light guide body 30 from the air medium, part of the light directly enters the inner wall surface 331 having an arc shape, and the inner wall surface 331 folds and reflects the light, thereby reflecting the plurality of light rays to the light emitting surface 32. The light is emitted to increase the brightness of the columnar light guide 3 as a whole.

Example 6

Referring to Fig. 7, the structure of this embodiment is substantially the same as that of the embodiment 5, except that the cavity 33 of the columnar light guide body 30 is designed in a polygonal shape. Since the cavity 33 has a polygonal cross section, the light source is incident on the cavity 33. After the inner wall surface 331, the light source that reflects at least one direction from the inner wall surface 331 to the light emitting surface 32 forms a brightness gain. Therefore, the user can rotate the columnar light guide 30 during illumination to adjust the reflection angle of the inner wall surface 331 to change the illumination direction of the surface light source.

Example 7

Referring to Fig. 8, the structure of this embodiment is also substantially the same as that of the embodiment 5, except that the cylindrical light guide body 30 has a polygonal outer shape.

Example 7

Referring to FIG. 9, FIG. 10, and FIG. 11, the cavity 33 of the columnar light guide body 30 of the present embodiment is provided with an axially rotatable reflection assembly 40, and the reflection assembly 40 has a reflection surface 41 on the side. When the light is incident on the cavity 33 of the columnar light guide body 30, the user can rotate the reflection component 40 to adjust the angle of the reflection surface 41 of the reflection component 40, and the light source can be adjusted through the reflection surface 41. A uniform surface light source with various angles is formed to illuminate, and the surface light source is guided to the illumination area. The adjustment light source device of the present invention has the effect of using a plurality of light emitting diode chips

The point light source generated by 20 is converted into a uniform surface light source by the columnar light guide body 30, and the surface light source is guided to the illumination area, thereby preventing the glare phenomenon and multiple shadows generated by the multi-point light source.

In addition, when the plurality of LED chips 20 are in operation, the heat of the plurality of LED chips 20 can be converted to the maximum heat dissipation area on the substrate 10 to improve the heat dissipation effect of the plurality of LED chips 20, so as to prevent the heat source from being accumulated at the fixed position. Further, the overall light-emitting conversion efficiency of the plurality of light-emitting diode chips 20 is further improved.

The above is only the preferred embodiment of the present invention, and the modifications and retouchings are within the scope of the present invention without departing from the basic idea of the technical solution of the present invention.

Claims

Claim

An adjustment type light source device comprising a linear light source comprising an array of light emitting diode chips, wherein at least one columnar light guide body is disposed adjacent to the line light source, and one side of the column light guide body is received light On the other side, the other side is the luminous surface.

The illuminating light source device according to claim 1, wherein the distance between the line light source and the columnar light guide is 5 mm.

The illuminating light source device according to claim 1 or 2, wherein the linear light source formed by arranging the light emitting diode chips is a line parallel or skewed in the axial direction or a combination thereof.

The illuminating light source device according to claim 1 or 2, wherein the columnar light guiding body is a solid column or a hollow column.

The illuminating light source device according to claim 1 or 2, wherein the columnar light guide body is a hollow tubular string, and the tube cavity is provided with an axially rotatable refractive component.

The adjustment type light source device according to claim 1 or 2, wherein the columnar light guide has an arc shape in cross section.

The illuminating light source device according to claim 1 or 2, wherein the columnar light guide has a polygonal cross section.

The illuminating light source device according to claim 1 or 2, wherein two sets of columnar light guide bodies are provided in parallel with the axial direction of the light-emitting surface of the columnar light guide body.