JP6028966B2 - Light source body and lighting device using the same - Google Patents

Description

  The present invention relates to a light source body that can be applied to an illumination device that illuminates an object, and an illumination device using the light source body.

  2. Description of the Related Art Conventionally, some illumination devices as auxiliary light at the time of taking a picture, large image display devices, automobile lamps, and the like use a light source body that emits substantially parallel light. An LED can be used as the light source of such a light source body. For example, in an image display device, a plurality of light emitting elements (LED chips) formed on the plane of the substrate and the light emitted from each light emitting element are arranged. A plurality of optical elements (microlens arrays) constitute a planar light source, and collimated light substantially perpendicular to the plane of the substrate is emitted by the optical elements (for example, Patent Document 1).

  Further, for example, a lamp is constituted by a bulb such as an incandescent bulb and a projection lens that focuses light emitted from the bulb, and the projection lens is arranged so that the focal point on the bulb side of the projection lens is located near the bulb. The exit surface of the projection lens is formed as an aspherical and convex light distribution control lens so that the exit direction is continuously refracted in the specified direction with respect to the incident angle of light from the focal position. There are some (see, for example, Patent Document 2). In this lamp, an LED may be used instead of a bulb.

JP 2002-049326 A JP 2006-114347 A

  On the surface (light emitting surface) of the LED chip used for the light source of various devices as described above, a plurality of light emitting parts and wiring parts (electrodes) for supplying current to each of the light emitting parts are provided. . In particular, in an LED chip in which a plurality of strip-like light emitting portions are arranged in parallel on a rectangular surface, a strip-shaped main wiring extending so as to cut the center of the surface vertically in order to uniformly supply current to each light emitting portion Some are provided with a section. Since the main wiring portion is formed with a certain width, there is a wide non-light emitting area on the surface of the LED chip. In general, when light is collimated and emitted in a substantially parallel state, the light projecting surface is not completely defocused, and the light source unevenness of the light source itself (here, the light emitting surface of the LED chip) appears on the light projecting surface. It may be reflected directly.

  On the other hand, Patent Document 1 has a configuration in which the light emitted from the lens becomes substantially parallel light by arranging the light source in the vicinity of the focal point of the lens. Is not done at all. Moreover, although the said patent document 2 is a structure which controlled the light distribution of the light radiate | emitted from a lens by using an aspherical lens for the lens as an optical system, there exists a non-light-emission area | region similarly. No measures are taken against this.

  As described above, in a lighting device or the like using a conventional LED as a light source, the light from the light emitting unit is emitted as a substantially parallel light by a lens, or the light distribution is controlled by a light distribution control lens to generate focused light. Although it can emit, the countermeasure regarding the point which has the said non-light-emitting area | region which an LED chip has is not taken. Therefore, there is a problem that there is a low illuminance region due to the non-light emitting region in the illuminance distribution of the emitted light, and illumination with uniform illuminance cannot be performed.

  As a result, for example, in an imaging device including an illumination device, luminance unevenness may occur in an image or a dynamic range may be substantially reduced even when a subject having a uniform density is captured. When some kind of recognition processing is performed based on the photographed image, there is a problem that the recognition accuracy is lowered.

  The present invention has been devised in order to solve such problems of the prior art, and its main purpose is based on emitted light from a light-emitting element having a non-light-emitting region in a part of a light-emitting surface, such as an LED. An object of the present invention is to provide a light source body capable of making the illuminance distribution of an irradiated body uniform and an illumination device using the same.

  The light source body of the present invention is a light source body that emits a light beam that illuminates an irradiated object at a predetermined distance, and the light source body has a light emitting region that emits light and a light emitting region that does not emit light. And a lens that covers the light emitting surface so that light from the light emitting surface becomes a light beam directed to the irradiated object, and the lens is a projected portion of the non-light emitting region when viewed from the optical axis direction. And a second emission region adjacent to the first emission region, wherein the first emission region and the second emission region of the lens are the first emission region and the second emission region. At least a part of the first irradiation region in the irradiated object by the light emitted from the emission region overlaps with the second irradiation region in the irradiated object by the light emitted from the second emission region of the luminous flux. Thus, the formed structure is adopted.

  According to the present invention, in a lens in which a light emitting surface and a non-light emitting region by wiring are provided on a light emitting surface, such as an LED chip, in a lens that emits light from the light emitting surface as a light beam directed to an irradiated body The illuminance of the first irradiation area in the irradiated object is reduced by the light emitted from the projection portion (first emission area) of the non-light emitting area when viewed from the optical axis direction, but is adjacent to the first emission area. Since the lens that overlaps at least part of the second irradiation area and the first irradiation area in the irradiated object by the light emitted from the portion (second emission area), the illuminance is insufficient due to the influence of the non-light emitting area. Therefore, it is possible to compensate for the amount of light in the irradiated region, and to suppress the occurrence of a reduced illuminance portion in the illuminance distribution. As a result, it is possible to eliminate a portion where the light amount is insufficient in the captured image, and it is possible to obtain a clear captured image.

The principal part perspective view which shows an example of the illuminating device using the light source body by this invention. Front view showing a part of the front surface of the illumination device that emits light A perspective view showing a light source body Top view showing LED chip It is explanatory drawing which shows the formation point of a lens, (a) The side view of a collimating lens, (b) is a figure which shows the cut location of a collimating lens, (c) is a lens formed in the shape which bonded the division body together. Illustration The principal part fracture side view which shows the light source body based on this invention (A) is a schematic diagram showing an irradiation region by a collimating lens, (b) is a schematic diagram showing an irradiation region by a lens of the present invention, a cutaway side view of a main part showing a light source body according to the present invention. (A) is a figure which shows the parallel light by a collimating lens, (b) is a figure which shows the emitted light by the lens based on this invention. Explanatory drawing which shows the emitted light by the division body shape which comprises a lens It is a figure which shows the formation point of the lens of 2nd Embodiment based on this invention, (a) is the figure seen from the optical axis direction which shows the cutting | disconnection location of a collimating lens, (b) shows the lens of 2nd Embodiment. View from the optical axis direction

  A first invention made to solve the above problem is a light source body that emits a light beam that illuminates an irradiated object at a predetermined distance, and the light source body emits light and a light emitting region that emits light. A light-emitting surface having a non-light-emitting region that does not, and a lens that covers the light-emitting surface so that light from the light-emitting surface becomes a light beam directed toward the irradiated object, the lens viewed from the optical axis direction , A first emission region corresponding to a projection part of the non-light emitting region, and a second emission region adjacent to the first emission region, wherein the first emission region and the second emission region of the lens The emission area includes a first irradiation area in the irradiated body by the light emitted from the first emission area and a second irradiation area in the irradiated body by the light emitted from the second emission area. The structure is formed so that at least part of it overlaps. To.

  According to this, in a lens in which a light emitting surface and a non-light emitting region by wiring are provided on a light emitting surface such as an LED chip, in a lens that emits light from the light emitting surface as a light beam directed to an irradiated object, Although the illuminance of the first irradiation region in the irradiated object by the light emitted from the projection portion (first emission region) of the non-light emitting region as viewed from the axial direction is reduced, the portion adjacent to the first emission region ( Since the lens that overlaps at least part of the second irradiation area and the first irradiation area in the irradiated object by the light emitted from the second emission area), the illuminance is insufficient due to the influence of the non-light emitting area. The amount of light in the irradiation area can be supplemented, and the occurrence of reduced illuminance in the illuminance distribution can be suppressed. As a result, it is possible to eliminate a portion where the light amount is insufficient in the captured image, and it is possible to obtain a clear captured image.

  According to a second invention, in the first invention, the lens forms a plurality of divided bodies by cutting a portion of the collimating lens corresponding to the projected portion of the non-light-emitting region, and the plurality of divided bodies. It is set as the structure currently formed in the shape bonded together by the cut surface.

  According to this, from the collimating lens for emitting parallel light, the shape of the lens is formed so as to be a shape obtained by pasting each divided body formed by cutting off the projected portion of the non-light emitting region, It is possible to easily form a lens that can suppress the occurrence of a portion in which the amount of light decreases in the emission region.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the non-light emitting region is provided in a strip shape that crosses the optical axis of the lens.

  According to this, it is possible to form a lens that can suppress the occurrence of a portion in which the amount of light decreases in the emission region with a simple shape in which the lens is formed symmetrically with the optical axis in between.

  According to a fourth aspect of the present invention, a lighting device has a configuration in which a plurality of light source bodies according to any one of the first to third aspects are arranged on a plane.

  According to this, in the illuminating device that is a planar light source in which a plurality of light source bodies are arranged on a plane, it is possible to suppress the occurrence of a portion where the light amount is insufficient due to the influence of the non-light emitting region of the light source body. A planar light source having a substantially uniform light amount distribution can be obtained.

  In a fifth aspect based on the fourth aspect, the light source body has an asymmetric non-light emitting region that is asymmetric with respect to the optical axis, and the plurality of asymmetric non-light emitting regions are the optical axis. It is set as the structure which is divided | segmented and arrange | positioned at at least two positions which rotate relatively around and differ from each other.

  According to this, in an illuminating device that is a planar light source in which a plurality of light source bodies are arranged on a plane, when each light source body has an asymmetric non-light emitting area that is asymmetric with respect to the optical axis, Where the illuminance distribution causes a portion where the illuminance is insufficient in the same direction, by arranging each light source body so as to change the position of the asymmetric non-light emitting region around the optical axis, The illuminance distribution can be made uniform.

  Further, a sixth invention is an illumination device including a light source body that emits a light beam that illuminates an irradiated object at a predetermined distance, and the light source body emits light and emits no light. A light-emitting surface having a region, and a lens that covers the light-emitting surface and converts light from the light-emitting surface into a light beam directed toward the irradiated body, and the non-light-emitting region in the light-emitting surface with respect to the power of the lens The power of the lens in the direction perpendicular to the direction in which the lens extends is larger.

  According to this, by setting the lens power so that light is condensed in the direction of reducing the non-light emitting area, it is possible to compensate for the amount of light in the irradiation area where the illuminance is insufficient due to the influence of the non-light emitting area. It can suppress that an illumination intensity fall part arises. As a result, it is possible to eliminate a portion where the light amount is insufficient in the captured image, and it is possible to obtain a clear captured image.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a main part showing an example of an illumination device using a light source body according to the present invention. FIG. 1 shows a drive recorder 1 mounted on an automobile V. In the drive recorder 1, an illumination device 3 that irradiates infrared light suitable for photographing at night is disposed next to the camera 2.

  FIG. 2 is a front view showing a part of the front surface of the illumination device 2 that emits light. As shown in the figure, a plurality of light source bodies 4 are arranged in a lattice form in a horizontal and vertical direction on a panel 2 a provided on the front surface of the lighting device 2.

  FIG. 3 is a perspective view showing the light source body 4. As shown in the figure, the light source body 4 includes an LED 5 and a lens 6 provided so as to cover the LED 5. The lens 6 covers the light emitting surface (described later) of the LED chip, and is configured to emit light from the light emitting surface as a light beam directed toward the irradiated body. The LED 5 is composed of a square base 7 as a substrate and an LED chip 8 disposed in the central portion of the base 7. In addition, the rectangular recessed part 7a is formed in the center part of the base 7, and the LED chip 8 is provided in the mounting state on the bottom face of the recessed part 7a. An upper terminal 7 b is formed of a copper foil on the bottom surface of the recess 7 a, and the upper terminal 7 b and the LED chip 8 are electrically connected via a wire 9. Further, an anode and a cathode are disposed at appropriate positions on the lower surface of the base 7, and when the light source body 4 is mounted on the panel 2a, it is connected to a power supply line formed on the panel 2a (not shown).

  FIG. 4 is a top view showing the LED chip 8. On the upper surface of the LED chip 8 as the light emitting surface 10, a plurality of strip-shaped light emitting portions 11 are arranged in each area as a light emitting region that is equally divided into two in the figure. Further, an upper electrode 12 for distributing and supplying a current to each light emitting part 11 surrounds the whole light emitting part 11 and is arranged at the center of the LED chip 8 and is a pad electrode connected to the wire 9 12a, a spine electrode 12b that passes through the pad electrode 12a and extends in the left-right direction so as to divide each light-emitting portion 8a vertically, and a left-right direction from the spine electrode 12b so that each light-emitting portion 11 is divided into strips. And a thin wire electrode 12c extending to each.

  In the LED chip 8 formed in this manner, each light emitting portion 11 constitutes a light emitting region, and the upper electrode 12 other than the light emitting portion 11 constitutes a non-light emitting region.

  FIG. 5 is an explanatory diagram showing the formation procedure of the lens 6. FIG. 5A is a side view of the collimating lens 13, and in the figure, the solid light line shows how light travels when the point light source is at the focal point f of the optical axis C of the collimating lens 13 (the emitted light is parallel light). Shown with arrows. As shown in FIG. 5B, the collimating lens 13 is cut by a plane that is spaced apart from the optical axis C by a predetermined length D in the radial direction and parallel to the optical axis C. Are divided into left and right symmetrical divided bodies 13a and 13b. And as FIG.5 (c) shows, each division body 13a * 13b is bonded together by cut surface 16a * 16b, and it is set as the shape of the lens 6. FIG. Actually, the lens 6 having the shape shown in FIG. 5C can be formed by a mold or the like.

  The optical axis C of the lens 6 is located on the surface (bonding surface) passing through the ridge lines (16a and 16b) formed by the shape in which the divided bodies 13a and 13b are bonded to each other by the cut surfaces 16a and 16b. This is the symmetry axis of both divided bodies 13a and 13b. The lens 6 is fixed to the base 7 so that the optical axis C is located at the center of the LED chip 8. As a result, when the point light source is located at the position corresponding to the focal point f in FIG. 5A, the light is moved toward the optical axis C by the lens 6 as indicated by L in FIG. 5C. The light is refracted and emitted.

  FIG. 6 is a cutaway side view of the main part showing the light source body 4 using the lens 6 formed as described in FIG. The lens 6 has emission areas A1 and A2 to be described later on the surface on the irradiated object side. Specifically, in the drawing, a projection portion of the spine electrode 12b as a non-light emitting region projected onto the lens 6 viewed from the direction of the optical axis C is defined as a first emission region A1, and the first emission region A1 adjacent to the first emission region A1. The two emission areas are indicated as A2. The spine electrode 12b extends in a band shape in the direction of the paper surface in the figure, and the emission regions A1 and A2 also extend in the band shape in the direction of the surface of the figure along the lens surface.

  When the collimating lens 13 is used as it is for the lens 6 (FIG. 5A), parallel light is emitted, so that the portion corresponding to the first emission region A1, which is a projection portion of the non-light emission region, is insufficient in light quantity. It becomes. The irradiation state in the irradiated body 21 in that case will be described with reference to FIG. As shown in FIG. 7A, in the case of parallel light by the collimating lens 13, the first light in the case where light is emitted from the first emission region A1 to the central portion of the irradiated object 21. The irradiation area S1 exists as shown by hatching in the drawing, and the left and right sides of the first irradiation area S1 are irradiated with the second irradiation areas S2a and S2b irradiated with the emitted light from the second emission area A2. Become.

The illuminance distribution in the irradiated object 21 in this case is shown in FIG. FIG. 8A shows the measurement result of the actual illuminance distribution, which is the illuminance distribution in the irradiated object when the distance from the light source body 4 to the irradiated object (target object) is 3 m, for example. The axis is a position corresponding to the line VIIIa-VIIIa in FIG. 7A in the LED chip 8, and the vertical axis is the illuminance (W / m ² ). In addition, since the emitted light from the adjacent second irradiation areas S2a and S2b reaches the first irradiation area S1, a certain level of illuminance is obtained. However, when photographing in such an illumination environment, since the illuminance of the first irradiation area S1 is low, a dark portion is generated in the photographed image, and a clear image may not be obtained.

  On the other hand, the divided bodies 13a and 13b formed as described above are obtained by cutting the optical axis C side with respect to the case of the collimating lens 13 (before cutting), and the lens 6 is bonded to each other. Since it has a shape, the refraction of the light emitted from the same position of the LED chip 8 by the lens 6 is directed to the optical axis C side as compared with the case of the collimating lens 13.

  That is, when the lens 6 is viewed from the optical axis direction C, the power of the lens 6 is increased in the direction in which the ridge lines (16a and 16b (see FIG. 5)) extend (hereinafter referred to as the ridge line direction) and in the direction orthogonal to the ridge line. In this embodiment, the power of the lens in the direction orthogonal to the ridge line is set larger than the power of the lens in the ridge line direction. In consideration of the arrangement of the spine electrode 12b, which is a non-light emitting region, on the light emitting surface 10 (see FIG. 4), the lens in the direction in which the non-light emitting region (spine electrode 12b) extends on the light emitting surface 10 with respect to the lens power. In other words, the power of the lens in the direction orthogonal to the light emitting surface 10 is made larger than the power of. Here, “lens power” refers to the magnitude of the incident angle of light with respect to the exit surface of a single material lens.

  In the optical axis direction C, the light emitting surface 10 of the LED chip 8 is disposed slightly closer to the lens 6 than the focal length f when the lens 6 is a collimator lens. Therefore, in the ridge line direction having a light distribution characteristic as a collimator lens, the emitted light is projected gradually spreading as the distance increases. On the other hand, in the direction orthogonal to the ridge line direction in which the lens power is set to be larger, the degree of diffusion of the emitted light can be kept relatively small.

  Thereby, a part La of the outgoing light from the second outgoing region A2 is more than the outgoing light Lp from the outer region (part farther from the second region A2 with respect to the optical axis C) in the divided bodies 13a and 13b. In addition, since a large amount of light can be condensed on the optical axis C side, the shortage of light quantity due to the first emission region A1 when the collimating lens 13 is used is eliminated. In addition, although there is the emitted light Ld from the first emission region A1, the increase in illuminance due to this is small, and it is effective to condense part La of the emitted light from the second emission region A2.

  A plurality of materials can be used instead of a single material lens. For example, the entire first lens may be covered with a second lens different from the refractive index of the first lens. In this case, regardless of the refractive indexes of the first and second lenses, the first irradiated area in the irradiated object by the light emitted from the first emission area and the light emitted from the second emission area. What is necessary is just to form both lenses so that at least one part with the 2nd irradiation area | region in a to-be-irradiated body may overlap.

  In this case, the illuminance distribution seen along the line VIIIb-VIIIb in FIG. 7B in the irradiated object 21 is as shown in FIG. 8B corresponding to FIG. As shown in the drawing, the second illuminance areas S2a and S2b partially overlap in the first illuminance area S1. Thereby, the illuminance decrease in the first illuminance area S1 is compensated by illumination by a part of the second illuminance areas S2a and S2b, and a uniform illuminance distribution is obtained in a predetermined range centered on the optical axis C. .

  Thus, according to the light source body 4 using the lens 6 of the present invention, as described above, the emitted light from the second emission region A2 of the lens 6 is condensed toward the optical axis C side and irradiated. In the body 21, the first irradiation region S <b> 1 whose illuminance may decrease corresponding to the non-light emitting region (upper electrode 12) is one of the second irradiation regions S <b> 2 by the light emitted from the second emission region A <b> 2. Therefore, a uniform illuminance distribution as shown in FIG. 8B is obtained under the same conditions as in FIG. 8A. Although the distance from the lens 6 to the irradiated object is 3 m in the above example, in the case of different distances, collimation is performed so that an illuminance distribution as shown in FIG. 8B is obtained according to the distance. This can be dealt with by appropriately increasing or decreasing the excision range of the lens 13, that is, setting to leave a curvature portion effective for condensing light on the optical axis C side by the divided bodies 13 a and 13 b. Alternatively, it is possible to cope with the lighting device by designing the distance between the lens 6 and the LED chip 8 (light emitting unit 11) to be adjustable.

  The present invention is effective for a light source body having a point light source, but even when the LED chip 8 is used as in the above embodiment, it is not actually a point light source but a surface emitting light source having a certain area. . For example, as shown in FIG. 9, when the focal point f of the original collimating lens 13 of the divided bodies 13a and 13b is located in the light emitting portion 11 that forms the light emitting surface 10 of the LED chip 8, the position (f) The emitted light can be emitted as parallel light Lp. As a result, even when the lens 6 having the bonded shape of the divided bodies 13a and 13b obtained by cutting off a part of the collimating lens 13 on the optical axis C side, emitted light composed of substantially parallel light beams can be obtained. It is a part of the vicinity of the optical axis C that condenses on the optical axis C side, and the entire emitted light can have a uniform illuminance distribution. Of course, as described above, the divided bodies 13a and 13b may be placed inside the focal point f of the lens 6 to adjust the irradiation range.

  As shown in FIG. 4, when there is a wire 9 extending in a direction different from the spine electrode 12b when viewed from the optical axis C direction, a part of the light emitting portion 11 is hidden by the wire 9, A portion hidden by the wire 9 becomes a non-light emitting region (low light amount region). Further, the wire 9 extends from the electrode pad 12a on the optical axis C in one direction radially outward, and becomes a non-light emitting region positioned asymmetrically with respect to the optical axis C.

  In addition, since the light emission part 11 exists in the part hidden by the wire 9, and most part of the wire 9 is arrange | positioned in the position closer to the lens 6, it does not become a complete non-light-emission area | region like the spine electrode 12b. For this reason, the amount of emitted light is not significantly reduced and the influence on the illuminance distribution is small. However, as shown in FIG. 2, a plurality of light source bodies 4 are arranged in a vertical and horizontal grid, In this case, for example, as shown in the drawing, the light source bodies 4 may be arranged by changing the extending direction of the wire 9 for each row (column in the horizontal direction in the drawing). Thereby, the non-light-emitting area | region by the wire 9 will be extended in a different direction with respect to the optical axis C, and since the direction of the illumination intensity fall part disperse | distributes, the illumination intensity distribution as the whole surface light source is equalized.

  Moreover, in the said embodiment, although the lens 6 was formed in the shape which bonded two symmetrical division bodies 13a * 13b on both sides of the optical axis C, it is not restricted to two division bodies. For example, as shown in FIG. 10 (a), similarly to each of the divided bodies 13a and 13b, the collimating lens 13 is symmetric with respect to the optical axis C and has the same length D in the directions orthogonal to each other. The four divided bodies 13c, 13d, 13e, and 13f are formed by cutting along four surfaces passing through the position. Then, as shown in FIG. 10B, a lens 16 having a shape in which the divided bodies 13c, 13d, 13e, and 13f are bonded to each other at the cut surfaces 16a, 16b, 16c, and 16d may be formed. The lens 16 can also be formed by a mold instead of bonding the cut pieces in the same manner as described above.

  With the lens 16 formed in this way, as shown in FIG. 10B, for example, when viewed from the direction of the optical axis C, the first portion between the two divided bodies 13c and 13d and the two divided bodies 13e and 13f is obtained. The ridge lines (16a and 16b) are located in the projected portion of the spine electrode 12b in the optical axis C direction, and the second ridge lines (16c and 16d) between the divided body 13c and the divided body 13d are in the optical axis C direction of the wire 9. It is located in the projected part. As a result, the emitted light from the vicinity along the first ridge line (16a, 16b) of the lens 16 is condensed on the optical axis C side as described above, and the illuminance is reduced by the spine electrode 12b in the irradiated object. Is suppressed. Furthermore, even when the illuminance drop due to the wire 9 in the irradiated body becomes large, the emitted light from the vicinity along the second ridge line (16c, 16d) of the lens 16 is condensed on the optical axis C side. Similarly, a decrease in illuminance due to the influence of the wire 9 on the object to be irradiated is suppressed, and irradiation with a more uniform illuminance distribution can be performed on the object to be irradiated.

  Further, the distance (D in the above example) to the optical axis C and the joint surface (ridge line 16a, etc.) when dividing the collimator lens 13 may be different in each of the two orthogonal directions. For example, D is increased in the direction perpendicular to the extending direction of the upper electrode 12 constituting the non-light emitting region (that is, the lens power is increased), and D is relatively decreased in the direction orthogonal to the extending direction of the wire 9. Also good. As a result, the illuminance distribution can be made even more uniform.

  Note that the number of divided bodies in the shape of the lens 6 is not limited to two or four, and may be set as appropriate according to the number and position of non-light emitting areas in the LED chip 8. In addition, even when the non-light emitting area is not on the optical axis, a part of the emitted light from the second emitting area adjacent to the first emitting area that is a projection part of the non-emitting area viewed from the optical axis direction in the lens However, a lens may be formed so as to illuminate the first irradiation region corresponding to the first emission region, and various types of LED chips can be handled.

  In the above description, the case of cutting out as a method of manufacturing a lens divided body has been described. However, the divided bodies may be formed individually and combined (bonded) without cutting. Moreover, you may shape | mold integrally the lens of the shape which bonded the division body, without forming a division body separately.

  The present invention has been described with reference to the preferred embodiments. However, as those skilled in the art can easily understand, the present invention is not limited to such embodiments, and the gist of the present invention. It is possible to make appropriate changes without departing from In addition, all the components shown in the above embodiment are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention.

  INDUSTRIAL APPLICABILITY The light source body according to the present invention and a lighting device using the light source body are useful as a lighting device such as a photographing device because it can suppress a decrease in illuminance in a portion affected by the non-light emitting region when the light emitting surface has a non-light emitting region It is.

3 Illumination device 4 Light source body 5 LED
6 Lens 8 LED chip 10 Light emitting surface 11 Light emitting part 12 Upper electrode 13 Collimate lenses 13a to 13f Divided bodies

Claims (5)

A light source that emits a light beam that illuminates an irradiated object at a predetermined distance,
The light source body includes a light emitting surface having a light emitting region that emits light and a non-light emitting region that does not emit light, and a lens that covers the light emitting surface so as to emit light from the light emitting surface as a light beam toward the irradiated body. And
The lens has a first emission region corresponding to a projection part of the non-light emitting region and a second emission region adjacent to the first emission region on the surface on the irradiated object side,
The first emission region and the second emission region of the lens are a first irradiation region of the irradiated object by the light emitted from the first emission region and an output from the second emission region. Formed so that at least a part of the second irradiation region in the irradiated body by the irradiation overlaps ,
The lens has a shape in which a plurality of divided bodies formed by cutting a portion corresponding to the non-light-emitting region when the collimating lens is viewed from the optical axis direction are bonded to each other at the cut surfaces of the plurality of divided bodies. A light source body characterized by being formed . A light source that emits a light beam that illuminates an irradiated object at a predetermined distance,
The light source body includes a light emitting surface having a light emitting region that emits light and a non-light emitting region that does not emit light, and a lens that covers the light emitting surface and converts light from the light emitting surface into a light flux toward the irradiated body. Have
The lens has a shape in which a plurality of divided bodies formed by cutting a portion corresponding to the non-light-emitting region when the collimating lens is viewed from the optical axis direction are bonded to each other at the cut surfaces of the plurality of divided bodies. Formed,
Regarding the power of this lens,
The light source body characterized in that the power of the lens in a direction orthogonal to the non-light-emitting region on the light-emitting surface is larger than the direction in which the non-light-emitting region extends .   3. The light source body according to claim 1, wherein the non-light-emitting region is provided in a belt shape extending in a direction crossing the optical axis of the lens.   4. A lighting device comprising a plurality of light source bodies according to claim 1 arranged on a plane. The light source body has an asymmetric non-light emitting region that is asymmetric with respect to the optical axis;
The lighting device according to claim 4, wherein the plurality of asymmetric non-light-emitting regions are arranged in at least two positions that rotate relative to each other around the optical axis and are different from each other.

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