CN201057405Y - Light emitting device capable of generating non-circular light shape - Google Patents

Abstract

A light emitting device capable of producing non-circular light shapes, comprising: the LED lamp comprises a lamp shell and a light-emitting unit arranged on the lamp shell, wherein the light-emitting unit is provided with a plurality of first and second light-emitting diodes, each light-emitting diode is provided with a light-emitting part, the length of a horizontal shaft of the light-emitting part of the first light-emitting diode is larger than that of a vertical shaft, and the length of a horizontal shaft of the light-emitting part of the second light-emitting diode is equal to or smaller than that of the vertical shaft. By means of the length configuration of the horizontal axis and the vertical axis on the first light-emitting diode and the second light-emitting diode, the regulation of the vehicle lamp on the regulation light distribution value can be met under the condition of using the light-emitting diodes with smaller power, and therefore the effects of saving materials and energy cost, reducing design difficulty and the like are achieved.

Description

Light-emitting device capable of producing non-circular light shapes

【Technical field】

The utility model relates to a light emitting device, in particular to a light emitting device which uses a light emitting diode as a light source and can generate non-circular light shapes.

【Background technique】

In the past, for example, in the design of car lights, the reflector on the inner surface of the lamp holder or the concentrating effect of the front lampshade are usually used to make the light source of the bulb concentrated in a predetermined direction. Power consumption is relatively high, so it has been gradually replaced by light-emitting diodes (LEDs for short) in recent years. The following is just an example of an automobile rear fog lamp that uses light-emitting diodes as a light source.

Referring to Fig. 1, 2, 3, conventional lighting device 1 comprises: a lamp housing 11, and a group of light-emitting units 12 installed in a chamber of the lamp housing 11, the lamp housing 11 has a lamp holder for the lighting unit 12 to be placed 111, and a lampshade 112 covering in front of the lamp holder 111, the light-emitting unit 12 has a circuit substrate 121, and two rows of light-emitting diodes 122 arranged up and down on the circuit substrate 121, the adjacent light-emitting diodes 122 The distance between them is about 0.8 cm, and each LED 122 has a circular light-emitting portion 123 located in the center and can generate an approximately circular light source.

When the light-emitting device 1 is in use in the past, the light produced by the light-emitting diodes 122 is projected onto a test screen at a fixed distance (for example, 3.16m) by the circular light-emitting part 123 through the lampshade 112. Although these light-emitting diodes 122 are arranged in two rows up and down, However, since the distance between them (0.8 cm) is relatively small relative to the projection distance (3.16 m), these light emitting diodes 122 still present an approximately circular symmetrical light shape such as that shown in FIG. 3 after being projected to a fixed point. This kind of circular light shape with nearly the same light intensity at the relative positions of up, down, left, and right has the function of lighting and warning. However, according to the regulations on the light distribution value of general car lights, the width in the horizontal direction needs to be greater than the light intensity in the vertical direction. , taking the light distribution value regulation of ECE (Economic Commission of Europe, Economic Commission of Europe) regulation R-38 shown in Figure 4 as an example, the standard light distribution value is roughly located in a diamond-shaped area, and the diamond-shaped area The light intensity value of each point must be between 75 ~ 300cd (candle power), and the light intensity value of each point on the horizontal H line must be between 150 ~ 300cd on the 10L ~ 10R, and the vertical V line must be on the 5U ~ 5D The light intensity value of each point must also be between 150 and 300cd, that is to say, the H line in the horizontal direction in the diamond-shaped standard interval is wider than the V line in the vertical direction.

Discussing the light-emitting device 1 with light-emitting diodes 122 in the past, if it adopts low-power light-emitting diodes 122, the approximately circular light shape generated can easily meet the light intensity requirements of the V line in the vertical direction, but it cannot meet the requirements for horizontal light in the regulations. The regulations on the H-line in the direction, on the contrary, when a higher-power light-emitting diode 122 is used, although it can meet the light intensity specification on the H-line in the horizontal direction, it seems wasteful in the vertical direction. That is to say, although the regulation of the light distribution value of car lamps in general regulations, the area in the vertical direction is smaller than the horizontal direction, but because the light shape generated by the light emitting diode 122 with the circular light emitting part 123 in the past is all circular, but in order to To enhance the light intensity near the edge of the H line in the horizontal direction, higher power LEDs 122 must be used. This design not only consumes a lot of power and wastes energy, but also requires a large number of LEDs 122, resulting in poor space design flexibility, and The manufacturing cost is higher and the like is missing.

【Content of utility model】

The purpose of the utility model is to provide a light-emitting device capable of producing non-circular light shapes, which can save energy, reduce power consumption, reduce manufacturing costs and improve design convenience.

The light emitting device capable of generating non-circular light shape of the utility model comprises: a lamp housing, and a light emitting unit installed on the lamp housing.

The utility model is characterized in that: the light-emitting unit has at least one first light-emitting diode and at least one second light-emitting diode, each light-emitting diode has a light-emitting portion, and the length of the horizontal axis of the light-emitting portion of the first light-emitting diode is longer than the length of the vertical axis. The length of the axis, and the length of the horizontal axis of the light emitting part of the second LED is equal to or smaller than the length of the vertical axis.

The beneficial effect of the utility model is that: the length of the horizontal axis of the first light-emitting diode is greater than the length of the vertical axis, so that the light-emitting device can generate a light shape with a width greater than its height, and the length of the horizontal axis of the light-emitting part of the second light-emitting diode can The design equal to or less than the length of the vertical axis can make up for the lack of light intensity above and below the adjacent central part, so that the light-emitting device can meet the requirements of the light distribution value of the car light in the case of using a small and low-power light-emitting diode. Regulation.

【Description of drawings】

FIG. 1 is a schematic cross-sectional top view of a conventional light-emitting device;

Fig. 2 is a front view of a light emitting unit of the conventional light emitting device;

FIG. 3 is a contour diagram showing the light shape generated by the conventional light-emitting device of FIG. 1;

Figure 4 is a light distribution diagram of the R-38 rear fog lamp in the ECE regulations;

Fig. 5 is a schematic cross-sectional top view of the first preferred embodiment of the light-emitting device of the present invention;

Fig. 6 is a front view of a light emitting unit of the first preferred embodiment;

Fig. 7 is a contour diagram showing the light shape generated by the light emitting device of the first preferred embodiment;

Fig. 8 is a front view similar to Fig. 6, showing the second preferred embodiment of the light emitting device of the present invention;

Fig. 9 is a contour diagram showing the light shape generated by the light emitting device of the second preferred embodiment;

Figure 10 is a front view similar to Figure 6, showing a third preferred embodiment of the light emitting device of the present invention; and

Fig. 11 is a contour diagram showing the light shape generated by the light emitting device of the third preferred embodiment.

【Detailed ways】

Below by preferred embodiment and accompanying drawing, the utility model is described in detail:

Referring to Fig. 5, 6, a preferred embodiment of the light-emitting device of the present invention comprises a lamp housing 2, and a light-emitting unit 3 installed in a chamber 20 of the lamp housing 2, the lamp housing 2 also has a The lamp holder 21 installed in the unit 3, and a lampshade 22 installed in front of the lamp holder 21 and available for light projection, and the light emitting unit 3 has a long rectangular circuit substrate 31, eight first light emitting diodes 32, and four a second light emitting diode 33, the circuit substrate 31 has two vertical sides 311, and two horizontal sides 312, and the above-mentioned first light emitting diodes 32 are in groups of four and are installed on the circuit substrate 31 in a rectangular arrangement, Adjacent to the vertical side 311 of the circuit board 31 at the same time, each first light-emitting diode 32 has an oval light-emitting portion 321, and the above-mentioned light-emitting portion 321 has a horizontal axis 322 parallel to the horizontal side 312, and a vertical axis 322 parallel to the vertical side 311. The vertical axis 323, wherein the length of the horizontal axis 322 is greater than the length of the vertical axis 323.

The second light emitting diodes 33 of this embodiment are installed in a rectangular arrangement near the center of the circuit board 31. Each second light emitting diode 33 has an oval light emitting portion 331, and the light emitting portion 331 has a A horizontal axis 332 of the horizontal side 312 and a vertical axis 333 parallel to the vertical side 311 , wherein the length of the horizontal axis 332 is shorter than the vertical axis 333 . That is to say, the light-emitting portions 321 of the first light-emitting diodes 32 in this embodiment are all in the shape of a horizontal ellipse, and the light-emitting portions 331 of the second light-emitting diodes 33 are all in the shape of a straight ellipse.

Referring to Figures 5 and 7, when the light-emitting device of this embodiment is in use, the horizontally elliptical light-emitting part 321 can produce a light shape with a wide side but a small height, while the straight elliptical light-emitting part 331 can produce a light shape with a narrow side but a large height. Ellipse light shape, when these light shapes are combined together, it will produce a rhombus-like light shape configuration. This light shape not only meets the regulations of ECE regulations for car lights, but also meets the regulations of SAE (Society of Automotive Engineers, American Society of Automotive Engineers) light value. That is to say, only using the first light-emitting diode 32 must increase the driving current to meet the brightness in the vertical direction, but in order to achieve the above purpose, the light intensity value at the center of the entire light shape will be relatively high, and there will be a waste of energy. .

More particularly, since this embodiment integrates two kinds of light-emitting diodes 32 and 33 that can produce different light shapes, it complies with the regulations on the light distribution value of domestic and foreign car lights. 32,33 to complete the collocation, therefore, in the design of the utility model as long as the use of low-power, low-energy light-emitting diodes 32,33 can achieve the desired purpose, in the overall design, as long as the use of less than the past The light emitting diodes 32 and 33 can make up for the required light distribution values in different directions. Therefore, this embodiment of the utility model not only has the effects of saving energy and saving the material cost of the light emitting device, but also can reduce the design space of the light emitting device. At the same time, it makes the car lights more flexible in shape design.

Referring to Figures 8 and 9, the second preferred embodiment of the light emitting device of the present invention also includes a lamp housing not shown in the figure, and a light emitting unit 3, and the above light emitting unit 3 also has a circuit substrate 31, eight first light emitting Diode 32, and four second light-emitting diodes 33, wherein the first light-emitting diode 32 installation position and shape are all identical with the first embodiment, and the second light-emitting diode 33 all has a centrally located light-emitting portion 331, and this light-emitting portion 331 is It is circular and has a horizontal axis 332 and a vertical axis 333 equal in length to the horizontal axis 332 and perpendicular to it.

This embodiment utilizes the configuration between the first light emitting diode 32 having a transverse ellipse-shaped light-emitting portion 321 and the second light-emitting diode 33 having a circular light-emitting portion 331, and can also use the first light-emitting diode 32 to generate a transverse ellipse light shape. , and the circular light emitting part 331 is used to supplement the light intensity requirements in the vertical direction, so in the case of using a 62.5mA driving current, this embodiment can also meet the requirements of the ECE regulations on rear fog lamps.

Referring to Figs. 10 and 11, the structure of the third preferred embodiment of the light emitting device of the present invention is similar to that of the first embodiment, the difference lies in the light emitting unit 3, that is to say, the light emitting unit 3 of the present embodiment has a circuit board 31 , seven first light-emitting diodes 32 and two second light-emitting diodes 33, also have three third light-emitting diodes 34, each first light-emitting diode 32 has a horizontally oval light-emitting portion 321, the second light-emitting diode 33 all have a straight elliptical light emitting part 331, the third light emitting diode 34 of the present embodiment has a circular light emitting part 341 respectively, by the cooperation of three light emitting parts 321, 331, 341 of different shapes and combinations , can also achieve the desired purpose.

It is worth further explaining that although each embodiment of the utility model is illustrated with 12 light emitting diodes 32, 33, 34 as an example, as far as the spirit of the utility model is concerned, as long as the light emitting unit 3 has two light emitting diodes, And the length of the horizontal axis of the light-emitting part of one of the light-emitting diodes is greater than the length of the vertical axis, and the length of the horizontal axis of the light-emitting part of the other light-emitting diode is equal to or smaller than the length of the vertical axis, the desired purpose can be achieved. As for the light-emitting diodes 32, 33, 34 The quantity depends on the brightness requirements and will not affect the shape of the light. In addition, since the distance between the light emitting diodes 32, 33, 34 is very short relative to the distance between the vehicle lights and the projection screen, the positions of the light emitting diodes 32, 33, 34 are not particularly limited. If the first light emitting diode 32 of the elliptical light emitting portion 321 is moved to the central position of the circuit substrate 31, the generated light shape will not be affected. More specifically, the design of the light-emitting device of the present invention can indeed produce the following effects:

1. Under the same light distribution value requirement, the utility model can reduce the number of required light emitting diodes, so it has the effects of reducing material cost, reducing the configuration space of light emitting devices, and improving the flexibility of shape design.

2. Since the utility model adopts the configuration of light-emitting diodes with different light shapes to produce non-circular light shapes, it can not only reduce the number of required light-emitting diodes in design, but also reduce the power consumption of a single light-emitting diode , so as to achieve the purpose of saving energy.

3. In the past, in the design of car lights, in order to produce a predetermined light shape, the reflective surface of the lamp holder or the light-gathering effect of the lampshade is usually changed by the design of optical principles. This optical design is quite complicated, but the utility model It is very simple to adopt the configuration of light-emitting diodes with different light shapes to generate a predetermined light shape, so it also has the effect of reducing the difficulty of designing the light-emitting device.

Claims (10)

1. the light-emitting device that can produce non-circular smooth shape comprises: a lamp housing, and a luminescence unit that is installed on this lamp housing;

It is characterized in that: this luminescence unit has at least one first light emitting diode, and at least one second light emitting diode, each light emitting diode all has an illuminating part, wherein a trunnion axis length of the illuminating part of this first light emitting diode is greater than the length of a vertical axis, and a trunnion axis length of the illuminating part of this second light emitting diode is equal to or less than the length of a vertical axis.

2. can produce the light-emitting device of non-circular smooth shape according to claim 1, it is characterized in that: the illuminating part of above-mentioned second light emitting diode is oval, and its trunnion axis is less than vertical axis.

3. as producing the light-emitting device of non-circular smooth shape as described in the claim 2, it is characterized in that: the illuminating part of above-mentioned first light emitting diode is oval.

4. as producing the light-emitting device of non-circular smooth shape as described in the claim 3, it is characterized in that: the above-mentioned second light emitting diode position is in central authorities, its quantity is four, and the quantity of first light emitting diode is eight, and symmetrical status is in the left and right sides of second light emitting diode.

5. can produce the light-emitting device of non-circular smooth shape according to claim 1, it is characterized in that: the illuminating part of above-mentioned second light emitting diode is circular, and its trunnion axis equals vertical axis.

6. as producing the light-emitting device of non-circular smooth shape as described in the claim 5, it is characterized in that: the illuminating part of above-mentioned first light emitting diode is oval.

7. as producing the light-emitting device of non-circular smooth shape as described in the claim 6, it is characterized in that: the above-mentioned second light emitting diode position is in central authorities, its quantity is four, and the quantity of first light emitting diode is eight, and symmetrical status is in the left and right sides of second light emitting diode.

8. as producing the light-emitting device of non-circular smooth shape as described in the claim 2, it is characterized in that: this luminescence unit also has at least one the 3rd light emitting diode, and above-mentioned the 3rd light emitting diode has the illuminating part of a circle.

9. as producing the light-emitting device of non-circular smooth shape as described in the claim 8, it is characterized in that: the quantity of above-mentioned first light emitting diode is seven, and the quantity of second light emitting diode is two, and the quantity of the 3rd light emitting diode is three.

10. as producing the light-emitting device of non-circular smooth shape in the claim 1 to 9 as described in each, it is characterized in that: this lamp housing has a lamp socket for the luminescence unit installation, and a lampshade that is installed in lamp socket the place ahead and can supplies light source to appear, and this luminescence unit also has a circuit substrate for above-mentioned light emitting diode installation.

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