TW202107009A - Light source device and lighting device comprising the same - Google Patents

Abstract

The invention provides a light source device capable of reducing the decrease in intensity of light that is illuminated on light exit surface of an integrator, even when a mounting angle or a mounting position of the light source device is deviated. The light source device 100 is composed of a plurality of light sources 120 and a plurality of optical tools 130 that convert the light from the corresponding light sources 120 into parallel light.

Description

Light source device and lighting device provided with the light source device

The present invention relates to a light source device with multiple light sources.

In the past, for example, as shown in Patent Document 1, an illuminating device 4 has been developed, which prepares a light source device 1 (a set of) light source 7 and irradiates parallel light L emitted from the light source device 1 to, for example, a fly-eye lens. The entire light-receiving surface 3 of the integrator 2 (refer to Fig. 8).

Furthermore, in order to make the emitted parallel light L illuminate the entire light receiving surface 3 of the integrator 2, and to position the optical axis CL from the light source device 1 at the center of the light receiving surface 3 of the integrator 2, the light source device 1 should be The required angle is mounted on the base member 5. (Prior technical literature) (Patent Document)

Patent Document 1: Patent No. 6371925 Specification

(The problem to be solved by the invention)

However, in reality, when there is a problem with the processing accuracy and mounting accuracy of each component, the mounting angle and mounting position of the light source device 1 with respect to the base member 5 may deviate from the planned value. If the installation angle and installation position of the light source device 1 deviate from the planned value, the irradiation range of the parallel light L emitted from the light source device 1 will deviate from the plan, and a part of the parallel light L will deviate from the irradiation surface (for example, the light-receiving surface 3 of the integrator). ) Deviation. As a result, the intensity of the light emitted from the light-emitting surface 6 of the integrator 2 may be greatly reduced.

The present invention was made in view of the above-mentioned problems, and its object is to provide a light source device and a lighting device using the light source device, which can reduce the amount of light irradiated on the irradiated surface even when the mounting angle and mounting position of the light source device are deviated. The decrease in strength is suppressed to be small. (Technical solution to solve the problem)

According to an aspect of the present invention, there is provided a light source device including a plurality of light sources and a plurality of optical parts, each of the optical parts turns light from a corresponding light source into parallel light.

Preferably, the optical axes of the light from the respective light sources that become parallel light by the respective optical members are parallel to each other.

Preferably, the optical axes of the lights from the respective light sources that become parallel light by the respective optical members converge on the irradiation surface.

According to another aspect of the present invention, there is provided an illuminating device including a plurality of the light source devices described above; and an integrator having a light receiving surface that receives light from each light source device.

Preferably, the lighting device further includes an optical path correction member arranged between each of the light source devices and the integrator. (Inventive effect)

According to the present invention, the lights emitted from the plurality of light sources respectively pass through the corresponding optical parts to become parallel lights. Therefore, it is possible to increase the number of "optical parts that irradiate parallel light" included in one light source device. As a result, even when the installation angle and the installation position of the light source device deviate, the light deviated from the irradiation surface can be limited to the light emitted from any one of the plurality of light sources. As a result, it is possible to provide a light source device and an illuminating device using the light source device, which can suppress a decrease in the intensity of light irradiated on the irradiation surface to be small.

(Configuration of Illumination Device 10) Hereinafter, the configuration of the lighting device 10 to which the present invention is applied will be described with reference to the drawings. In addition, the lighting device 10 to which the present invention is applied can be used for industrial applications such as exposure devices, and can also be used for general lighting applications such as stage lighting and road lighting.

As shown in FIG. 1, the lighting device 10 roughly includes a light source device 100, an integrator 12, and an optical path correction member 14.

As shown in FIG. 2, the light source device 100 includes a light source device main body 110, a plurality of light sources 120, and a plurality of optical members 130.

The light source device main body 110 according to the present embodiment is formed in a substantially square tube shape having a base portion 112, and an optical member 130 is arranged in an internal space 114 thereof. In addition, a light source 120 is installed on the surface 116 of the base portion 112. Of course, the shape of the main body 110 of the light source device is not limited to a square tube shape, but may also be a cylindrical shape, or, if the required number of light sources 120 and optical elements 130 can be arranged and held in a given position, it may also be uncovered. From the side (direction perpendicular to the optical axis CL of the light source 120), the shapes of the light source 120 and the optical member 130 inside can be visually observed from the side of the light source device 100.

In addition, in this embodiment, the surface 116 of the base portion 112 on which the multiple light sources 120 are mounted is formed flat, and the optical axes CL of the light sources 120 mounted on the surface 116 are parallel to each other.

The light source 120 is a member that emits light of a predetermined amount of light and wavelength, and in this embodiment, a light emitting diode (LED) is used. Of course, the type of light source 120 is not limited to light-emitting diodes, and may also be organic EL, incandescent lamp, electric spot lamp, discharge lamp, or the like.

The optical members 130 respectively correspond to the light sources 120 different from each other, and have a function of making the light from the corresponding light source 120 parallel light.

In addition, throughout this specification, "parallel light" is not limited to being perfectly parallel (=0°) in the geometrical meaning, but allows an off angle to ±10°, preferably ±5° or less.

In this embodiment, two lenses are used as the optical element 130. Specifically, the first lens 132 is arranged near the light source 120, and the second lens 134 is arranged near the opening 118 of the light source device main body 110. The light emitted from the light source 120 is refracted when passing through the two lenses 132 and 134, and becomes substantially parallel light L at the stage when it is emitted from the second lens 134.

In addition, as described above, although the optical element 130 according to this embodiment is composed of two lenses 132 and 134, the form of the optical element 130 is not limited to this, and it may be composed of one lens or three or more lenses. It can be a reflecting plate with a reflecting surface, a reflecting mirror, or the like. Furthermore, a lens, a reflecting plate, a reflecting mirror, etc. may be appropriately combined.

In addition, as described above, in this embodiment, the light sources 120 are arranged on the surface 116 of the base 112 of the light source device main body 110 such that the optical axes CL are parallel to each other. Therefore, as shown in FIG. The entire emitted light becomes light L parallel to each other.

Returning to FIG. 1, the integrator 12 is a member having a function of receiving light from a plurality of light source devices 100 on the light receiving surface 16 and enhancing the uniformity of the light and then emitting it from the light emitting surface 18. In this embodiment, as the integrator 12, a fly-eye lens having a plurality of small lens bodies formed on the surface is used.

In addition, as long as the above function can be achieved, the integrator 12 is not limited to a fly-eye lens, and for example, a rod lens or the like may be used.

The optical path correction member 14 is a member for further increasing the parallelism of the light L from the corresponding light source device 100 when the parallelism of the light L from the corresponding light source device 100 is insufficient, and is arranged between the corresponding light source device 100 and the integrator 12. In addition, as shown in the figure, the number of optical path correction components 14 can be the same as that of the light source device 100, and one optical path correction component 14 can be used for one light source device 100. It is also possible to use one optical path correction component 14 to correspond to all The light of the light source device 100.

In addition, a lens is used as the optical path correction member 14 in this embodiment. Of course, the optical path correcting component 14 is not limited to a lens. For example, a mirror or the like can also be used as the optical path correcting component 14.

In addition, since the optical path correction member 14 is not an essential component of the present invention, it is also conceivable that the lighting device 10 does not include the optical path correction member 14.

(Features of the light source device 100 and the lighting device 10) According to the illuminating device 10 related to this embodiment described above, as shown in FIG. 3, the light emitted from each light source 120 in each light source device 100 passes through the corresponding optical member 130 to become a plurality of parallel lights L parallel to each other, and The light-receiving surface 16 of the integrator 12 is illuminated.

Thus, as shown in FIG. 4, one integrator 12 is like a plurality of small (small in the height direction) integrator 12, and the light emitted from each light source 120 is irradiated on the light receiving surface 16 without overlapping each other (refer to FIG. "Light intensity" in). That is, the “optical portion 140 that irradiates the parallel light L” (the dashed-dotted line in FIG. 4) included in one light source device 100 can be multiple. Thus, even when the installation angle or installation position of the light source device 100 is deviated, the light deviated from the light receiving surface 16 of the integrator 12 can be limited to the light emitted from any one of the light sources 120. . Thereby, the decrease in the intensity of the light emitted from the light-emitting surface 18 of the integrator 12 can be suppressed to be smaller.

In addition, as shown in FIG. 5, this result can further improve the uniformity of the illuminance from the center of the integrator 12 to the vicinity of the end (refer to the “overall light intensity” in the figure).

(Modification 1) In the above embodiment, the surface 116 of the base 112 on which the multiple light sources 120 are mounted is formed flat, and the optical axes CL of the light sources 120 mounted on the surface 116 are parallel to each other, but it can also be replaced, as shown in FIG. 6, The light sources 120 and the optical member 130 are arranged at an angle to each other so that the optical axis CL of each light source 120 converges (coincides) with each other at the center of the integrator 12 (in addition, only the first The lens 132 constitutes the optical member 130). For example, as shown in the figure, the light source 120 and the like can be arranged at a given angle with respect to the surface 116 of the base 112, or as shown in FIG. 7, a plurality of small bases 113 corresponding to each light source 120 can be arranged, and the These small base portions 113 are arranged so as to form an angle with each other.

As a result, as shown in the figure, the illuminance of the central portion of the integrator 12 can be further increased.

(Modification 2) In the above embodiment, the object irradiated by the light source device 100 is the integrator 12, but the object irradiated by the light source device 100 is not limited to the integrator 12, and may be a broader concept "irradiation surface".

All viewpoints in the embodiments disclosed in the present invention should be regarded as illustrative rather than restrictive. The scope of rights of the present invention is not defined by the above description, but defined by those shown in the scope of the patent application, and the intention is to include the meaning equivalent to the scope of the patent application and all changes within the scope.

10: Lighting device 12: Integrator 14: Optical path correction components 16: light-receiving surface 18: Glossy surface 100: light source device 110: Main body of light source device 112: base part 113: Small base 114: internal space 116: Surface (of base 112) 118: open 120: light source 130: optical parts 132: The first lens 134: second lens 140: Optics Department

FIG. 1 is a diagram showing a lighting device 10 according to an embodiment to which the present invention is applied. FIG. 2 is a diagram showing a light source device 100 according to an embodiment to which the present invention is applied. FIG. 3 is a diagram illustrating that the lights emitted from the light sources 120 in the light source device 100 are generally parallel to each other. FIG. 4 is a diagram showing the distribution of the light intensity of the light irradiation integrator 12 (irradiation surface) emitted from one light source device 100. FIG. 5 is a diagram showing the distribution of the overall light intensity when light emitted from a plurality of light source devices 100 irradiates the integrator 12 (irradiation surface). 6 is a diagram showing the distribution of light intensity when light emitted from a plurality of light sources 120 in the light source device 100 according to Modification 1 irradiates the integrator 12 (irradiation surface). FIG. 7 is a diagram showing a light source device 100 according to Modification Example 1. As shown in FIG. FIG. 8 is a diagram showing a lighting device 4 related to the prior art.

100: light source device

110: Main body of light source device

112: base part

114: internal space

116: (base 112) surface

118: open

120: light source

130: optical parts

132: The first lens

134: second lens

Claims (5)

A light source device is provided with a plurality of light sources and a plurality of optical parts, Each of the optical members turns the light from the corresponding light source into parallel light. The light source device according to claim 1, wherein: The optical axes of the light from each of the light sources that become parallel light by each of the optical members are parallel to each other. The light source device according to claim 1, wherein: The optical axes of the light from each of the light sources, which become parallel light by each of the optical members, converge with each other on the irradiation surface. A lighting device with: The light source device according to any one of claims 1 to 3; and The integrator has a light-receiving surface, and the light-receiving surface receives light from each of the light source devices. The lighting device according to claim 4, wherein: The lighting device further includes an optical path correction member arranged between each of the light source devices and the integrator.

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