CN102980072A - Light source modules and lamps - Google Patents

Abstract

The invention relates to a light source module and a lamp. The lamp comprises a light source module and a lamp holder. The light source module comprises a plurality of light-emitting elements, a shading element and a light guide element. The plurality of light emitting elements are arranged on a first reference straight line and are suitable for emitting a light beam. The shading element is positioned between the light guide element and each light emitting element, has a gap with each light emitting element, and is provided with a plurality of light transmitting openings and at least one light gathering reflecting surface, wherein the plurality of light transmitting openings are arranged on a second reference straight line parallel to the first reference straight line, and the plurality of light transmitting openings respectively correspond to the plurality of light emitting elements. The lamp holder extends along a direction parallel to the first reference straight line and is provided with a first end, a second end opposite to the first end and a side wall connecting the first end and the second end. The lamp holder is also provided with an accommodating groove which extends along the direction parallel to the first reference straight line, and at least part of the light source module is arranged in the accommodating groove. The lamp provided by the invention has a smaller light-emitting angle.

Description

Light source modules and lamps

This application is a divisional application of the Chinese invention patent application filed on March 1, 2010 with application number 201010124986.5

technical field

The invention relates to a light source module and a lamp.

Background technique

With the advancement of semiconductor technology, light-emitting diodes (light-emitting diodes, referred to as: LED) can achieve higher and higher power, and the intensity of the emitted light is higher and higher. In addition, light-emitting diodes have the advantages of power saving, long service life, environmental protection, fast start-up, and small size. Therefore, light-emitting diodes are also widely used in lighting equipment, traffic signs, monitors, optical mice and other products, and there is a tendency to gradually replace traditional fluorescent tubes.

For existing small white light emitting diode lighting fixtures, there are generally the following two problems. First of all, the optical design space of small lamps is limited, and it is difficult to deflect the light with a large deflection angle emitted by the light-emitting diode into light with a small enough deflection angle by using the existing optical design method, and the light with an excessively large deflection angle is very important for lighting. As far as lamps are concerned, it is stray light, which has a bad influence on the final light pattern and beam angle. Furthermore, the reason why white light-emitting diodes emit white light is that the light-emitting diode chip emits blue light. After the blue light passes through the phosphor, it will be converted into yellow light, and the yellow light converted by the phosphor powder and the unconverted blue light are mixed into white light. . Since the blue light emitted by the light-emitting diode has a certain degree of directivity, the light intensity of the blue light that deviates from the optical axis at a larger angle is weaker, and the intensity of the yellow light that deviates from the optical axis at a larger angle is greater than that of the blue light. . In this way, a yellow halo will be produced at the edge of the illumination range of the lighting fixture.

In addition, generally, the wires of the existing LED lamps are routed from both ends of the lamps. Such a routing design will prevent multiple lamps from being arranged in a straight line in a close proximity along the direction of their extension. .

Contents of the invention

The purpose of the present invention is to provide a light source module with a small light emitting angle.

Another object of the present invention is to provide a lamp with a smaller light output angle.

An embodiment of the present invention provides a light source module, which includes at least one light emitting element, a light shielding element and a light guiding element. The light emitting element has an optical axis and is suitable for emitting a light beam. The light-shielding element is arranged between the light-guiding element and the light-emitting element, and has at least one light-transmitting opening and at least one light-condensing reflection surface, and there is a gap between the light-shielding element and the light-emitting element. A first part of the light beam will pass through the light-transmitting opening to the light-guiding element and then pass through the light-guiding element. A second part of the light beam will pass through the light-transmitting opening and be reflected and converged by the light-concentrating reflective surface, and then pass through the light-guiding element component, a third part of the light beam will be blocked by the light shielding component and cannot be transmitted to the light guiding component.

In an embodiment of the present invention, the light emitting element is, for example, a light emitting diode. The light emitting diode is, for example, a white light emitting diode.

In an embodiment of the present invention, the inner diameter of the light-transmitting opening in at least one direction is smaller than the outer diameter of the light-emitting section of the light-emitting element in this direction.

In an embodiment of the present invention, the light source module further includes a diffusion sheet disposed between the light shielding element and the light emitting element.

In an embodiment of the present invention, the light collecting and reflecting surface is, for example, a concave surface.

In an embodiment of the present invention, there are multiple light-emitting elements, and multiple light-transmitting openings. The light-emitting elements can be arranged on a first reference line, and the light-transmitting openings can be arranged on a second reference line. The first reference straight line can be substantially parallel to the second reference straight line, and the light emitting elements can respectively correspond to the light-transmitting openings. The light source module may further include a circuit board, wherein the light emitting elements are arranged on the circuit board.

In an embodiment of the present invention, the light guide element is, for example, a condenser lens.

Another embodiment of the present invention provides a lamp, which includes a light source module, a lamp holder and a first power cord. The light source module includes a light guide element, a plurality of light emitting elements and a light shielding element. A plurality of light emitting elements are arranged on a first reference line, and each light emitting element is suitable for emitting a light beam. The light-shielding element is located between the light guide element and each of the light-emitting elements and has a gap between each of the light-emitting elements, and has a plurality of light-transmitting openings and at least one light-condensing reflective surface, wherein the plurality of The light-transmitting holes are arranged on a second reference line, the first reference line is substantially parallel to the second reference line, and the plurality of light-transmitting holes respectively correspond to the plurality of light-emitting elements. The lamp holder extends along a direction parallel to the first reference line, and has a first end, a second end opposite to the first end, and a side wall connecting the first end and the second end. The lamp holder also has an accommodating groove, the accommodating groove extends along a direction parallel to the first reference line, and at least part of the light source module is disposed in the accommodating groove. One end of the first power line is connected to the side wall.

In an embodiment of the present invention, the lamp further includes a second power cord, wherein one end of the second power cord is connected to the side wall and is close to the second end of the lamp holder. This end of the first power cord may be close to the first end of the lamp socket.

In an embodiment of the present invention, the lamp further includes a male plug and a female plug. A male plug is connected to the other end of the first power cord. The female plug is connected to the other end of the second power cord, wherein the shape of the male plug and the shape of the female plug are suitable for mutual fitting and electrical connection.

In an embodiment of the present invention, the inner diameter of each light-transmitting opening in at least one direction is smaller than the outer diameter of the light-emitting section of the corresponding light-emitting element in this direction.

In the light source module and lamp of the present invention, the light beam emitted by the light-emitting element must pass through the light-transmitting opening of the light-shielding element to the light-guiding element, and pass through the light-guiding element to be transmitted to the outside. In other words, the light emitting angle of the light beam transmitted to the outside is limited by the shading element, so the light source module and the lamp in the embodiment of the present invention can provide illumination with a small light emitting angle. In addition, since the shading element has a light concentrating reflective surface for reflecting and converging part of the light beam, this also helps the light source module and the lamp in the embodiment of the present invention provide illumination with a small light output angle.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1A is a perspective view of a lamp according to an embodiment of the present invention.

Fig. 1B is an exploded view of the lamp of Fig. 1A.

FIG. 2A is a cross-sectional view of the lamp in FIG. 1A along line I-I.

FIG. 2B is a perspective view of the light shielding element in FIG. 1B .

FIG. 3 is a schematic diagram of a plurality of lamps in FIG. 1A arranged in a straight line.

Description of main component symbols:

Detailed ways

Fig. 1A is a perspective view of a lamp according to an embodiment of the present invention, Fig. 1B is an exploded view of the lamp in Fig. 1A, Fig. 2A is a sectional view of the lamp in Fig. 1A along line I-I, and Fig. 2B is a shading element in Fig. 1B stereogram. Referring to FIG. 1A , FIG. 1B , FIG. 2A and FIG. 2B , the lamp 100 of this embodiment includes a light source module 200 and a lamp holder 110 . The light source module 200 includes at least one light emitting element 210 (a plurality of light emitting elements 210 are taken as an example in the figure), a light shielding element 220 and a light guiding element 230 . The light emitting element 210 is suitable for emitting a light beam 212 (as shown in FIG. 2A ). In this embodiment, the light emitting element 210 has an optical axis A. As shown in FIG. In addition, in this embodiment, the light emitting element 210 is, for example, a light emitting diode. Specifically, the light emitting element 210 is, for example, a white light emitting diode. However, in other embodiments, the light-emitting element 210 may also be a light-emitting diode or other light-emitting elements that emit light of other colors.

The light-shielding element 220 is arranged between the light-guiding element 230 and the light-emitting element 210, and has at least one light-transmitting opening 222 (in the figure, a plurality of light-transmitting openings 222 are taken as an example, as shown in FIG. The light reflecting surface 224 (two light collecting and reflecting surfaces 224 are taken as an example in the figure), and there is a gap between the light shielding element and the light emitting element. In addition, the light-shielding element 220 is, for example, a light-shielding sheet. In addition, in this embodiment, the light emitting elements 210 are arranged on a first reference line L1 (as shown in FIG. 1B ), and the light-transmitting openings 222 are arranged on a second reference line L2 (as shown in FIGS. 1B and 2B ). ), and the first reference straight line L1 is substantially parallel to the second reference straight line L2. The light-emitting elements 210 respectively correspond to the light-transmitting openings 222 , in other words, the orthographic projections of the light-emitting elements 210 on the light-shielding element 220 overlap at least partially with the light-transmitting openings 222 respectively. In this embodiment, the light source module 200 further includes a circuit board 240 , and the light emitting elements 210 are disposed on the circuit board 240 and are electrically connected to the circuit board 240 .

The light-guiding element 230 is disposed on the light-shielding element 220 , and the light-transmitting opening 222 is located between the light-emitting element 210 and the light-guiding element 230 . In this embodiment, the light guide element 230 is, for example, a condenser lens. Specifically, the light guide element 230 is, for example, a meniscus lens. However, in other embodiments, the light guiding element 230 may also be a plano-convex lens, a bi-convex lens or other types of light concentrating elements.

A first part 212a of the light beam 212 will pass through the light-transmitting opening 222 to the light guide element 230 (for example, pass to the light guide element 230 along the optical axis A) and then pass through the light guide element 230, and a second part of the light beam 212 The part 212 b passes through the light-transmitting opening 222 and is reflected and converged by the light-condensing reflective surface 224 , and then passes through the light-guiding element 230 . In addition, a third portion 212 c of the light beam 212 (ie, the portion that deviates from the optical axis A at a large angle) is blocked by the light shielding element 220 and cannot be transmitted to the light guiding element 230 .

In this embodiment, the lamp holder 110 extends along a direction parallel to the first reference line L1, and has a first end 112, a second end 114 opposite to the first end 112, and a connection between the first end 112 and the first end 112. The side wall 116 of the second end 114 . The lamp holder 110 also has an accommodating groove 118 extending along a direction parallel to the first reference line L1, and at least part of the light source module 200 is disposed in the accommodating groove 118 . In this embodiment, the light-emitting element 210, the circuit board 240 and the light-shielding element 220 are all located in the accommodation groove 118, while a part of the light guide element 230 is located in the accommodation groove 118, while the other part protrudes from the accommodation groove. groove 118 outside. In addition, in this embodiment, the lamp 100 further includes two side covers 160 and 170 respectively disposed on the first end 112 and the second end 114 of the lamp holder 110 . Specifically, the side covers 160 , 170 can be respectively locked to the first end 112 and the second end 114 through the locking member 180 , and the locking member 180 is, for example, a screw.

In the light source module 200 and the lamp 100 of this embodiment, the light beam 212 emitted by the light-emitting element 210 must pass through the light-transmitting opening 222 of the light-shielding element 220 to the light-guiding element 230 , and pass through the light-guiding element 230 to the outside world. In addition, the third portion 212c of the light beam 212 that deviates from the optical axis A at a large angle will be blocked by the light shielding element 220 and cannot be transmitted to the outside. In other words, the light output angle of the light beam 212 transmitted to the outside is limited by the shading element, so the light source module 200 and the lamp 100 of this embodiment can provide illumination with a small light output angle in the case of limited optical design space. Furthermore, because the third part 212c of the light beam 212 emitted by the white light emitting diode deviates from the optical axis A at a large angle, after passing through the fluorescent package, the phenomenon of uneven color mixing of blue light and yellow light will occur, resulting in a yellowish color Therefore, the light source module 200 and the lamp 100 of this embodiment block the third part 212c of the light beam 212 through the shading element 220, which can effectively improve the yellow halo phenomenon produced by the existing white light emitting diode light source module or lamp. Illumination with a smaller light output angle and lower yellow halo phenomenon can be applied to specific purposes. For example, the light source module 200 and the lamp 100 of this embodiment can be used as illumination for artworks or paintings, so that artworks or The painting is more eye-catching relative to the environment, and the lighting without yellow halo can more realistically present the color of the artwork or painting. Alternatively, other kinds of localized lighting can be used to make localized areas more prominent than surrounding areas.

In addition, since the light-shielding element 220 has a light-concentrating reflective surface 224 for reflecting and converging part of the light beam, this also helps the light source module 200 and the lamp 100 of this embodiment provide illumination with a smaller light output angle. In this embodiment, the light collecting and reflecting surface 224 is, for example, a concave surface. Specifically, each of the light-concentrating and reflecting surfaces 224 is, for example, a concave surface curved in a direction perpendicular to the second reference line L2 , and the concave surface is not curved in a direction parallel to the second reference line L2 . In this way, the light source module 200 and the lamp 100 of this embodiment can provide illumination with a smaller light output angle in the direction perpendicular to the second reference straight line L2.

In order to further narrow the light emitting angle of the illumination provided by the light source module 200 and the lamp 100, and to further improve the yellow halo phenomenon, in this embodiment, each light-transmitting opening 222 can be arranged in at least one direction (in the figure, The inner diameter D1 in the direction perpendicular to the second reference line L2 (for example) is smaller than the outer diameter D2 of the corresponding light emitting section 214 of the light emitting element 210 in this direction (ie, in the direction perpendicular to the second reference line L2 ). In this way, the shading element 220 further restricts the angle of the light beam 212 that can pass through it. In other words, the shading element 220 allows the light beam 212 that deviates from the optical axis A at a smaller angle to pass through, and blocks the light beam 212 that deviates from the optical axis A at other angles. .

In addition, in order to enable the light source module 200 and the lamp 100 to provide uniform illumination under the premise of providing illumination with a small light output angle, a diffusion sheet can be arranged between the light shielding element 220 and the light emitting element 210 in this embodiment. 250 , and the diffusion sheet 250 is located between the light-transmitting opening 222 and the light-emitting element 210 . Since the light beam 212 passing through the diffuser 250 has to pass through the light-transmitting opening 222, the exit angle of the light beam 212 is still limited by the size of the light-transmitting opening 222, so adding the diffuser 250 at the above position will not result in a significant increase in the light exit angle , but can make the illumination more uniform.

In this embodiment, the lamp 100 further includes a first power cord 120, a first end 122 of the first power cord 120 is connected to the side wall 116, and a second end 124 of the first power cord 120 can be electrically connected to to an external power supply. Specifically, the second end 124 of the first power cord 120 can be connected to a plug 130, and the plug 130 can be plugged into a socket (not shown) of an external power source. In this embodiment, the plug 130 has a positive terminal and a negative terminal. When the light-emitting element 210 adopts a plurality of light-emitting diodes with different light-emitting colors (such as red light-emitting diodes, green light-emitting diodes, and blue light-emitting diodes), the plug 130 may also include a plurality of terminals corresponding to light-emitting diodes of different colors (such as corresponding to to the terminals of the red, green and blue LEDs).

In this embodiment, the lamp 100 may further include a second power cord 140 , a first end 142 of the second power cord 140 is connected to the side wall 116 and is close to the second end 114 of the lamp socket 110 . In addition, the first end 122 of the first power cord 120 can be close to the first end 112 of the lamp holder 110 . A second end 144 of the second power cord 140 can be connected to a plug 150, and the plug 150 can be connected to an external power source. In this embodiment, the plug 130 is, for example, a male plug, and the plug 150 is, for example, a female plug, wherein the shape of the male plug and the shape of the female plug are suitable for mutual fitting and electrical connection. For example, please refer to FIG. 3 , which is a schematic diagram of a plurality of lamps in FIG. 1A arranged in a straight line. A plurality of lamps 100 of this embodiment (including the lamp 100 a and the lamp 100 b ) can be arranged in a straight line along the extension direction of the lamp holder 110 . In addition, the plug 150 of the lamp 100a can be connected with the plug 130 of the lamp 100b, so that a plurality of lamps 100 can form a longer linear light source. Please refer to FIG. 1B and FIG. 3 , since the first power line 120 and the second power line 140 of the lamp 100 of this embodiment are connected to the side wall 116 of the lamp holder 110 (as shown in FIG. 1B ), that is, the first power line 120 and the second power line 140 are drawn from the side wall 116 instead of from the first end 112 or the second end 114 of the lamp holder 110, so the first end 112 of the lamp holder 110 of one of the two adjacent lamps 100 can be Close to the second end 114 of the other lamp holder 110 of the two adjacent lamps 100 without being interfered by the power line. In this way, the application modes of the lamp 100 can be increased. In other embodiments, the first end 112 of the lamp holder 110 of one of the two adjacent lamps 100 may also be adjacent to the second end of the lamp holder 110 of the other of the two adjacent lamps 100, and the two do not bear against each other. .

It should be noted that, in other embodiments, the plug 130 and the plug 150 can also be female plugs and male plugs respectively. In addition, more than three lamps 100 may be arranged in a straight line along the extension direction of the lamp holder 110 , and two adjacent lamps 100 are electrically connected to each other through the connection of the plug 130 and the plug 150 .

To sum up, in the light source module and the lamp of the embodiment of the present invention, the light beam emitted by the light-emitting element must pass through the light-transmitting opening of the light-shielding element to the light-guiding element, and then pass through the light-guiding element to be transmitted to the outside. Therefore, part of the light beam that deviates from the optical axis at a large angle will be blocked by the shading element and cannot be transmitted to the outside. In other words, the exit angle of the light beam transmitted to the outside will be limited by the light shielding element. In addition, since the light-shielding element has a light-concentrating reflective surface to reflect and converge part of the light beams, the light source module and the lamp of the embodiment of the present invention are further promoted to provide illumination with a smaller light output angle. Therefore, the light source module and the lamp of the embodiment of the present invention can provide illumination with a small light output angle under the premise of limited optical design space.

Furthermore, when white light emitting diodes are used as the light emitting element, since the partial light beams emitted by the white light emitting diodes deviate from the optical axis at a large angle, the intensity is low, and the color after passing through the package will be yellowish. Therefore, the light source module and the lamp of the embodiment of the present invention block this part of the light beam through the shading element, effectively improving the yellow halo phenomenon produced by the existing white light emitting diode light source module or lamp.

In addition, since the first power line and the second power line of the lamp in the embodiment of the present invention are connected to the side wall of the lamp holder instead of the first end or the second end of the lamp holder, one of two adjacent lamps The first end of the lamp holder can be close to or close to the second end of the other lamp holder of two adjacent lamps without being interfered by the power line. In this way, the application modes of the lamps can be increased.

Although the present invention has been disclosed above with embodiments, it is not intended to limit the present invention. Any person skilled in the art can make appropriate changes or equivalent replacements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention The scope defined in the claims shall prevail.

Claims (7)

1. A light fixture, characterized in that it comprises: A light source module, including: a light guide element; a plurality of light emitting elements arranged on a first reference line, each light emitting element is adapted to emit a light beam; and A light-shielding element, located between the light-guiding element and each of the light-emitting elements, has a gap between each of the light-emitting elements, and has a plurality of light-transmitting openings and at least one light-condensing reflective surface, wherein the A plurality of light-transmitting openings are arranged on a second reference line, the first reference line is substantially parallel to the second reference line, and the plurality of light-transmitting openings respectively correspond to the plurality of light-emitting elements ; A lamp holder, extending along a direction parallel to the first reference line, and having a first end, a second end opposite to the first end, and a connection between the first end and the second The side wall of the end, wherein the lamp holder also has an accommodating groove, the accommodating groove extends along a direction parallel to the first reference line, and at least part of the light source module is arranged in the accommodating placed in the groove; and A first power line, one end of the first power line is connected to the side wall. 2. The lamp according to claim 1, further comprising a second power cord, one end of the second power cord is connected to the side wall and is close to the second end of the lamp holder , the end of the first power cord is close to the first end of the lamp holder. 3. The lamp according to claim 2, further comprising: a male plug connected to the other end of the first power cord; and A female plug is connected to the other end of the second power cord, wherein the shape of the male plug and the shape of the female plug are suitable for mutual fitting and electrical connection. 4. The lamp according to claim 1, wherein each of the light emitting elements is a light emitting diode. 5 . The lamp according to claim 1 , wherein the inner diameter of each of the light-transmitting openings in at least one direction is smaller than the outer diameter of the light-emitting section of the corresponding light-emitting element in the direction. 6 . The lamp according to claim 1 , wherein the light source module further comprises a diffusion sheet disposed between the light-shielding element and the plurality of light-emitting elements. 7. The lamp according to claim 1, wherein the light guide element is a condenser lens.

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