Lamp assembly

Abstract

A lamp assembly according to the present invention is used as a light source of a head lamp or a beacon, and comprises: a dichroic filter member that has a filter surface for transmitting light irradiated from the rear and reflecting light irradiated from both sides toward the front; a first light source irradiation unit including a green first light source provided at a side corresponding to the front side of the dichroic filter member, and a first aspherical lens provided between the dichroic filter member and the first light source in order to concentrate light irradiated from the first light source; a second light source irradiation unit which is provided on both sides of the dichroic filter member so as to match an optical axis with the first light source irradiation unit, and which includes a red second light source and a second aspherical lens provided between the second light source and the dichroic filter member in order to concentrate light irradiated from the second light source; and a third light source irradiation unit including a blue third light source and a second aspherical lens provided between the third light source and the dichroic filter member in order to concentrate light irradiated from the third light source.

Description

lamp assembly

[0001] The present invention relates to a lamp assembly, and more particularly, to a lamp assembly used as a light source for a headlamp or headlight of an automobile.

[0002] The light emitting lamps used in headlamps or beacons generally installed in vehicles have a structure that can irradiate light forward from multiple light sources. These light sources use light emitting diodes (LEDs), which have a relatively long lifespan and high luminous efficiency.

[0003] These LED light source modules include an LED light source that irradiates light, a PCB (Printed Circuit Board) that controls the supply of current to the LED light source, and a light guide that guides the movement of light from the LED light source and irradiates it to the outside as needed, as well as an inner lens and an outer lens.

[0004] Recently, headlamps with multiple LED light sources arranged in a matrix configuration have been developed. Matrix headlamps control the lighting of some of the LED light sources to prevent glare to oncoming vehicles.

[0005] Korean Patent No. 10-10044532 discloses a lighting device using an LED lamp. The disclosed lighting device includes a light source unit comprising R, G, and B LED lamps; a control unit connected to each of the R, G, and B lamps; a photosynthesizing unit for synthesizing light emitted from the R, G, and B lamps; and a light projection unit for projecting the synthesized light, and has a structure in which the amount of light from the R, G, and B lamps is adjusted by current control of the control unit, so that the color of the synthesized light from the photosynthesizing unit can be changed.

[0006] Korean Patent Publication No. 10-2023-0090657 discloses a lamp unit and a vehicle lamp including the same, and Korean Patent Registration No. 10-2390256 discloses a headlamp unit for an automobile.

[0007] Since the posted lamps use multiple LEDs as light sources, in order to implement the desired color, the light emitted from the R, G, and B LED lamps is synthesized, and these are arranged inline or dot-like.

[0008] Therefore, since these R, G, B LED lamps are kept spaced apart at a certain interval, there is a problem in that the light emitted from each lamp is not accurately synthesized on the coaxial line.

[0009] In addition, when using a lens to focus or diverge the light irradiated from each R, G, B LED lamp, it is difficult to expect improvement in color purity because the focusing length does not match, resulting in a color separation phenomenon. In other words, the optical axis of the light irradiated from each R, G, B LED lamp must pass through the center so that the light irradiated from each lamp, which is a light source, can be focused and diverged with as little loss as possible. However, when each lamp is arranged in-line or dot type, it is difficult to align the optical axes. The mismatch of the optical axes makes it difficult to implement the desired color in the color coordinates, and not only does it make it difficult to irradiate light to a long distance due to the large light loss, but it is also difficult to transform the cross-sectional shape of the light source into a uniform shape.

[0010] The present invention is intended to solve the above-described problems, and to provide a lamp assembly that can reduce aberrations due to light focusing by a lens by aligning the optical axes of a plurality of light sources, and further prevent the phenomenon of light separation and enable color implementation on a color coordinate.

[0011] Another object of the present invention is to provide a lamp assembly that can be used as a light source for a headlamp or a lamp by improving color combination and irradiating light of a color with relatively high visibility.

[0012] In order to achieve the above object, the lamp assembly of the present invention comprises a dichroic filter member having a filter surface for transmitting light irradiated from the rear and reflecting light irradiated from both sides to the front, a first light source irradiation unit including a first green light source installed on a side corresponding to the front side of the dichroic filter member and a first aspherical lens installed between the dichroic filter member for focusing light irradiated from the first light source,

[0013] A second light source irradiation unit is provided on each side of the dichroic filter member so that the optical axis of the first light source irradiation unit is aligned, and includes a second red light source, a second aspherical lens installed between the second light source and the dichroic filter member to focus light irradiated from the second light source, and a third blue light source, and a third aspherical lens installed between the third light source and the dichroic filter member to focus light irradiated from the third light source.

[0014] In the present invention, the first, second, and third aspherical lenses are each formed by continuously arranging a plurality of unit curvature-forming surfaces along the circumferential direction, and the curvature of the aspherical surface becomes smaller from the center to the edge, so that the unit curvature-forming surfaces of the different unit aspherical focusing sections have different slopes or curvatures.

[0015] The front side of the above dichroic filter member is further provided with an irradiation pattern adjusting lens for adjusting the irradiation pattern of light irradiated from the first, second, and third light source irradiation units, and an aspherical reflective lens for reflecting the projected light in a radial direction is further provided on the front side of the above dichroic filter member.

[0016] The above-mentioned investigation pattern adjustment lens has a smooth incident surface corresponding to the side emitted from the dichroic filter member, and has a lens body that is integrally curved with a convex refracting surface that refracts light passing through the incident surface left and right or up and down while maintaining the same distance.

[0017] The above-mentioned aspherical reflective lens comprises an aspherical reflective lens body having a cone shape with a sharp central portion, a core reflective portion formed along an outer peripheral surface from the central portion of the aspherical reflective lens body to reflect light, and a light-gathering reflective portion formed from the core reflective portion toward the edge of the aspherical reflective lens body to reflect incident light into a light irradiation area reflected by the core reflective portion.

[0018] The lamp assembly according to the present invention can be used as a light source for a headlamp of an automobile, a light fixture, etc., and can increase the color purity of light of a desired color when synthesizing light by aligning the optical axes of light irradiated from a first green light source, a second red light source, and a third blue light source, and can easily adjust the light irradiation pattern irradiated through a lens unit installed in front of a dichroic filter member.

[0019] Figure 1 is a drawing showing a lamp assembly according to the present invention;

[0020] Figure 2 is a side view showing the first, second, and third aspherical lenses illustrated in Figure 1.

[0021] Figures 3 to 6 are drawings showing other embodiments of a lamp assembly according to the present invention.

[0022] The lamp assembly according to the present invention can be used as a light source for a headlamp or a light fixture of an automobile, and examples thereof are shown in FIGS. 1 to 4.

[0023] Referring to the drawing, the lamp assembly (10) according to the present invention has a dichroic filter member (20) having filter surfaces (21 to 24) for transmitting light irradiated from the rear and reflecting light irradiated from both sides to the front.

[0024] And, a green first light source (31) is installed on the back side of the dichroic filter member (20), and a first light irradiation unit (30) is installed between the first light source (31) and the dichroic filter member (20) to irradiate light irradiated from the first light source (31) to a certain area of ​​the dichroic filter member (20).

[0025] On both sides of the above dichroic filter member (20), second and third light irradiation units (40) (50) are respectively installed to irradiate red light and blue light to the front with the same optical axis as the optical axis passing through the dichroic filter member by the first light irradiation unit (30).

[0026] The second light irradiation unit (40) for irradiating the above red light is intended to irradiate light coaxially with the light source irradiated by the first light irradiation unit (30) by being reflected by the filter surface of the dichroic filter member (20), and the second light source (41) for irradiating the red light is installed on one side of the dichroic filter member (20) and has a second aspherical lens (42) for focusing the light irradiated from the second light source (41) so that it can be irradiated toward the filter surface (21) (22) of the dichroic filter (20).

[0027] And the third light irradiation unit (50) for irradiating blue light is for irradiating light coaxially with the light source irradiated by the first light irradiation unit (30) by being reflected by the filter surface of the dichroic filter member (20), and is provided with a third light source (51) for irradiating blue light and a third aspherical lens (52) that focuses the light irradiated from the third light source (51) so that it can be irradiated toward the filter surface (23)(24) of the dichroic filter (20) installed on the other side of the dichroic filter member (20).

[0028] It is preferable that the first, second, and third light sources (31)(41)(51) above use green LEDs, red LEDs, and blue LEDs, respectively. The first, second, and third light sources (31)(41)(51) may have a plurality of pixels for irradiating light.

[0029] And the first, second, and third aspherical lenses (32)(42)(52) are for focusing the light irradiated from each light source onto the incident side of the dichroic filter member (20), and have positive power.

[0030] The first, second, and third aspheric lenses (32), (42), and (52) may each be made of transparent polycarbonate (PC: poly-carbonate) material.

[0031] Each aspherical surface (32a)(42a)(52a) of the first, second, and third aspherical lenses (32)(42)(52) is formed such that the curvature decreases from the center to the edge, and unit curvature-forming surfaces having different inclinations or curvatures can be continuously arranged from the center to the edge of the first, second, and third aspherical surfaces (32a)(42a)(52a) relative to the central axis of the first, second, and third aspherical lenses (32)(42)(52).

[0032] Specifically, the aspherical surface (32a)(42a)(52a) is formed by continuously forming a plurality of annular unit aspherical focusing lens parts (32b)(42b)(52b) whose diameters increase from the center to the edge. In addition, the unit aspherical focusing lens parts (32b)(42b)(52b) are formed by continuously arranging a plurality of unit curvature-forming surfaces (32c)(42c)(52c) along the circumferential direction.

[0033] The unit curvature forming surfaces of different unit aspherical focusing lens sections (32b)(42b)(52b) have different inclinations or curvatures with respect to the central axis line (not shown) so that the curvature of the aspherical surface becomes smaller from the center to the edge of the aspherical surface (32a)(42a)(52a).

[0034] That is, the respective inclinations or curvatures of the aspherical multi-aspherical focusing lens parts (32b)(42b)(52b) allow light irradiated along the periphery of the optical axis line passing through the center of the first, second, and third aspherical lenses (32)(42)(52) to be directed along the optical axis line at a desired distance in front of the aspherical lenses, thereby allowing light to be focused to the front and side of the dichroic filter member.

[0035] To explain this in more detail, it is preferable that the slope or curvature of each unit curvature-forming surface of the unit aspherical focusing lens parts (32b)(42b)(52b) be formed so that the angle of refraction of light passing through the aspherical lens gradually increases as it gets farther away from the center of the aspherical surface. Alternatively, the slope or curvature of each unit curvature-forming surface of the unit aspherical focusing lens parts (32b)(42b)(52b) may form such that spherical aberration becomes larger as it gets farther away from the center of the aspherical surface.

[0036] By focusing the light emitted from each light source by the unit aspherical focusing lens parts (32b)(42b)(52b) toward the central portion of the dichroic filter member located in front of the aspherical lens, the focusing density can be increased to form a core light.

[0037] Meanwhile, as shown in FIGS. 3 and 4, the front side of the dichroic filter member is further provided with an irradiation pattern adjustment lens (60) for adjusting the irradiation pattern of the synthesized light irradiated from the first, second, and third light irradiation units (30), (40), and (50), or an aspherical reflection lens (70) for reflecting the projected light in the radial direction.

[0038] The irradiation pattern adjustment lens (60) installed on the front side of the above dichroic filter member (20) has a smooth incident surface (61) corresponding to the side emitted from the dichroic filter member (20), and has at least one adjustment lens (64) having a lens body (63) with a curved refracting surface (62) of a convex shape that refracts light passing through the incident surface (61) left and right or up and down.

[0039] The above-described investigation pattern adjustment lens is not limited to the above-described embodiment, and may further include a diverging lens section having an incident surface drawn in with a predetermined curvature in the longitudinal direction, as illustrated in FIG. 4.

[0040] And, as shown in Fig. 5, the aspherical reflective lens (70) installed on the front side of the dichroic filter member (20) reflects the light irradiated from the dichroic filter member (20) in the radial direction (normal direction to the alignment axis of the dichroic filter member and the aspherical reflective lens).

[0041] This aspherical reflective lens (70) is positioned coaxially with the central axis of the light irradiated from the dichroic filter member (20).

[0042] This aspheric reflective lens (70) includes a cone-type aspheric reflective lens body (71). The aspheric reflective lens body (71) has a sharp anti-reflective portion (73) formed in the central portion corresponding to the central axis, and has a light reflective portion (75) for reflecting incident light in the normal direction (hereinafter abbreviated as radial direction) with respect to the arrangement axis of the dichroic filter member (20) and the aspheric reflective lens (70), i.e., the arrangement central axis in the vertical direction.

[0043] The above light reflecting portion (75) is provided with a core reflecting portion (76) formed from the non-reflecting portion (73) of the aspherical reflective lens body (71) toward the edge of the aspherical reflective lens body (71), and a light collecting reflecting portion (78) formed from the core reflecting portion (76) toward the edge of the aspherical reflective lens body (71) to reflect the reflected light into the reflection area of ​​the core reflecting portion (76) and prevent scattering.

[0044] The core reflector (76) formed on the outer surface of the above-mentioned non-reflective lens body (71) can be formed so that the curvature changes as it goes from the non-reflective portion (73) to the light-gathering reflector (78).

[0045] The core reflector (76) is formed along the circumferential direction on the outer surface of the aspherical reflective lens body (71) and has unit core reflectors (77) that can reflect the core light irradiated from the light collecting lens body (78). The unit core reflectors (77) are formed in a ring shape along the outer surface centered on the central axis of the aspherical reflective lens body (71). Each of the unit core reflectors (77) has a different curvature from the non-reflective portion (73) toward the light collecting reflector (78) and can be formed continuously or discontinuously.

[0046] And the above light-gathering reflector (78) is for reflecting light irradiated from the dichroic filter member (20) to the reflection area of ​​the core reflector (76), and has a structure in which annular unit light-gathering reflectors (not shown) each having a reflection curvature for reflecting incident light are continuously formed on the outer surface between the edge of the core reflector (76) and the edge of the aspherical reflective lens body (71).

[0047] The reflection angle of the above unit light-gathering reflector, i.e., the reflection angle with respect to the central axis, is formed to be relatively larger than the reflection angle of the core reflector (76).

[0048] The light-gathering reflector (78) formed by the above-mentioned unit light-gathering reflectors has a large luminous intensity radius, so that the surface of the aspherical reflective lens body (71) and the core reflector (76) and the light-gathering reflector (78) form an S-curve from the non-reflective portion (71). That is, an S-curve is formed from the non-reflective portion (71) toward the edge of the aspherical reflective lens body (71).

[0049] As described above, a reflective film can be formed on the outer surface where the core reflector (76) and the unit light-gathering reflector formed by the unit core reflector (77) are continuously formed on the outer surface of the aspherical reflective lens body (71).

[0050] Such a spherical reflective lens can be formed with a structure in which the upper and lower parts are symmetrical as shown in Fig. 6. In this case, a configuration having a dichroic filter element for irradiating light and first, second, and third light irradiating parts can be installed on the upper and lower sides, respectively.

[0051] The lamp assembly according to the present invention configured as described above can be used as a light source for a headlamp or a light fixture.

[0052] In this lamp assembly (10), green light irradiated from each first light source (31) is focused by the first aspherical lens (32), then incident on the dichroic filter member (20), passes through the filter member, and is irradiated to the front. In addition, red light irradiated from the second light source (41) of the second light irradiation unit (40) is focused by the second aspherical lens, then reflected by the first and second filter surfaces (21) (22), and is irradiated to the front with the same optical axis as the light irradiated from the first light source, and blue light irradiated from the third light source (51) of the third light irradiation unit (50) is focused by the third aspherical lens, then reflected by the third and fourth filter surfaces (23) (24), and is irradiated to the front with the same optical axis as the light irradiated from the first and second light sources.

[0053] In this process, the first, second, and third aspherical lenses (32)(42)(52) are formed with unit aspherical focusing lens sections (32b)(42b)(52b) having different radii of curvature from the center to the edge, so that the focusing power increases from the center to the edge, thereby forming a core light having a predetermined diameter. Since their optical axes are aligned, light of a desired color can be obtained by combining light.

[0054] Accordingly, since the green, red, and blue lights are arranged in-line or dot-type as in the past, the imbalance of light synthesis caused by the misalignment of the optical axis can be prevented, thereby increasing the color purity of the desired color on the color coordinates.

[0055] In this way, the light passing through the dichroic filter element is focused or diverged in the horizontal or vertical direction while passing through the irradiation pattern adjustment lens (60), and is irradiated with the cross-sectional shape adjusted, and is reflected in the radial direction by the aspherical reflective lens (70) as shown in FIGS. 5 and 6.

[0056] As described above, the lamp assembly according to the present invention can increase the color purity of the light irradiated as needed when used as a headlamp, secure visibility by adjusting the pattern of the light irradiated, and increase the focusing power of the light when used as a light source for a lamp, thereby making the focusing length relatively long.

[0057] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

Claims

1. A first light source irradiation unit including a dichroic filter member having a filter surface for transmitting light irradiated from the rear and reflecting light irradiated from both sides to the front, a first green light source installed on a side corresponding to the front side of the dichroic filter member, and a first aspherical lens installed between the dichroic filter member for focusing light irradiated from the first light source, A lamp assembly characterized by comprising a second light source irradiation unit including a second red light source and a second aspherical lens installed between the second light source and the dichroic filter member to focus light irradiated from the second light source, and a third blue light source and a third light source irradiation unit including a second aspherical lens installed between the third light source and the dichroic filter member to focus light irradiated from the third light source, each of which is installed on both sides of the dichroic filter member so that the optical axis of the first light source irradiation unit is aligned.

2. In paragraph 1, The first, second, and third aspherical lenses are each formed by continuously arranging a number of unit curvature-forming surfaces along the circumferential direction. A lamp assembly characterized in that the unit curvature forming surfaces of the different unit aspherical focusing parts have different slopes or curvatures, such that the curvature of the aspherical surface becomes smaller from the center to the edge of the aspherical surface.

3. In paragraph 1, A lamp assembly characterized in that the front side of the dichroic filter member further includes an irradiation pattern adjusting lens for adjusting the irradiation pattern of light irradiated from the first, second, and third light source irradiation units, and an aspherical reflective lens for reflecting the projected light in a radial direction on the front side of the dichroic filter member.

4. In paragraph 3, The above-mentioned investigation pattern adjustment lens has a smooth incident surface corresponding to the side emitted from the dichroic filter member, and is a lamp assembly characterized by having a lens body with a curved refracting surface of a convex shape that refracts light passing through the incident surface left and right or up and down.

5. In paragraph 3, The above reflective lens unit is a lamp assembly characterized in that it has an aspherical reflective lens having a cone-shaped aspherical reflective lens body with a sharp central portion, a core reflective portion formed along the outer circumference from the central portion of the aspherical reflective lens body to radiate light, and a light-gathering reflective portion formed from the core reflective portion toward the edge of the aspherical reflective lens body to reflect incident light into a light irradiation area reflected by the core reflective portion.

6. In paragraph 5, A lamp assembly characterized in that a sharp non-reflective portion is formed to prevent light incident on the central portion of the above direct light aspherical reflective lens from being reflected.

7. In paragraph 5, A lamp assembly characterized in that the above light-gathering reflector is formed in a continuous manner with annular unit light-gathering reflectors, each having a reflective curvature for reflecting incident light, on the outer surface between the edge of the core reflector and the edge of the aspherical reflective lens body.

8. In paragraph 5, A lamp assembly for a light fixture, characterized in that the surface trajectories of the core reflector and the light-gathering reflector are formed in an S curve from the non-reflective portion toward the edge of the aspherical reflective lens body.

9. In paragraph 8, The above aspherical reflective lens has a structure in which a cone-shaped light reflecting portion is symmetrical upward and downward to reflect light collected by a collecting lens located at the upper and lower portions. A lamp assembly characterized by further comprising a dichroic filter member for irradiating core light on a symmetrical side and first, second, and third light irradiation units installed on the rear and both sides thereof.

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