JP-7856934-B2 - light source device

JP7856934B2JP 7856934 B2JP7856934 B2JP 7856934B2JP-7856934-B2

Inventors

▲吉▼田典正
岡久強志

Assignees

日亜化学工業株式会社

Dates

Publication Date: 20260512
Application Date: 20250715
Priority Date: 20200123

Claims (18)

A light source device for irradiating light into two or more irradiation areas, Multiple light-emitting units, each having a light-emitting surface on its upper surface, which can be selected to light up one or more units, A first lens covering the light-emitting surface of the plurality of light-emitting units, The optical lens has a first surface including multiple incident regions and a second surface including multiple exit regions, and is located above the light-emitting surface of the light-emitting unit. Light emitted from each of the light-emitting units enters the optical lens via the first lens. A light source device in which the plurality of light-emitting units are arranged in a matrix, and the size of the light-emitting surface of the light-emitting unit located in the center is different from the size of the light-emitting surface of the light-emitting units located in the corners.
The light source device according to claim 1, wherein, in the plurality of light-emitting units arranged in a matrix, the size of the light-emitting surface of the light-emitting unit located in the center is larger than the size of the light-emitting surface of the light-emitting units located in the corners.
The light source device according to claim 1, wherein, in the plurality of light-emitting units arranged in a matrix, the size of the light-emitting surface of the light-emitting unit located at the corner is larger than the size of the light-emitting surface of the light-emitting unit located at the center.
The plurality of light-emitting units emit light from the light-emitting surface at a first half-power full angle, The light source device according to any one of claims 1 to 3, wherein the light emitted from each of the light-emitting parts is emitted from the first lens at a second half-width angle smaller than the first half-width angle.
The light source device according to any one of claims 1 to 4, wherein the first lens covers the light-emitting surfaces of the plurality of light-emitting units collectively and has at least one convex surface on the optical lens side.
The first lens receives light emitted from at least one of the light-emitting parts, tilted at an angle γ with respect to the optical axis of the optical lens, and is incident on the optical lens. The light source device according to any one of claims 1 to 5, wherein light emitted from at least one light-emitting unit is emitted from the optical lens toward an irradiation area corresponding to the angle γ.
The aforementioned angle γ is, The shortest distance L (0 < L) from the optical axis of the optical lens to the center of the light-emitting surface of the light-emitting part arranged in the corner of the matrix, The shortest distance x (0 < x ≤ L) from the optical axis of the optical lens to the center of the light-emitting surface of the light-emitting part that emits light from the optical axis that is inclined to the optical axis, Using the intersection point of the plane on which the light-emitting surfaces of the plurality of light-emitting units extend and the optical axis of the optical lens as the center point, and the straight line connecting this center point to one of the two points located diagonally opposite the region that includes the entire illumination area, and the angle α (0° < α < 180°) formed by the straight line connecting the center point and the other point between the two, The light source device according to claim 6, as expressed as follows.
The light source device according to any one of claims 1 to 7, wherein the optical lens is composed of a plurality of lenses.
Each of the plurality of incident regions of the optical lens is A first incident region into which light emitted from a light-emitting unit corresponding to the incident region is incident, A light source device according to any one of claims 1 to 8, further comprising: a second incident region into which light emitted from a light-emitting unit adjacent to the light-emitting unit is incident, in addition to the light said.
Each of the plurality of emission regions of the optical lens is A first emission region from which light incident on the optical lens via the incident region corresponding to the emission region is emitted, A light source device according to any one of claims 1 to 9, further comprising, in addition to the light, a second emission region from which light incident on the optical lens from an incidence region adjacent to the incidence region is emitted.
The light source device according to any one of claims 1 to 10, wherein the light-emitting unit and the illumination area irradiated by the light emitted from the light-emitting unit are in a point-symmetrical arrangement with respect to a point located on the optical axis of the first lens, which is positioned on the light-emitting unit.
The light source device according to claim 11, wherein the single point corresponding to each of the plurality of light-emitting parts is the same point.
The light source device according to any one of claims 1 to 12, wherein the plurality of light-emitting units are arranged in an m x n matrix.
The light-emitting section includes a wavelength conversion member, The light-emitting surface of the light-emitting portion is the upper surface of the wavelength conversion member, as described in any one of claims 1 to 13.
The plurality of light-emitting units are arranged on the upper surface of the substrate. A frame covering the plurality of light-emitting units, the first lens, and the optical lens is provided on the upper surface of the substrate. The light source device according to any one of claims 1 to 14, wherein the height from the top surface of the substrate to the top surface of the frame is 2.0 mm or more and 10.0 mm or less.
The light source device according to any one of claims 1 to 15, wherein the shortest distance between the first surface of the optical lens and the first lens is 0.1 mm or more and 0.5 mm or less.
The light source device according to any one of claims 1 to 16, wherein the light emitted from the plurality of light-emitting units intersects with the optical axis of the optical lens or passes through the optical axis of the optical lens to illuminate the illumination area.
The light source device according to any one of claims 1 to 17 is a light source device for use with a flash.

Description

This disclosure relates to a light source device. In recent years, light sources using multiple light-emitting elements, such as light-emitting diodes, have become widely used. For example, Patent Document 1 discloses a light source that can be used for the flash of a small camera, such as one mounted on a mobile phone. Patent No. 5275557 This is a perspective view of a flash light source according to Embodiment 1 of this disclosure.Figure 1 shows a top view of the light-emitting section of a flash light source, illustrating the arrangement of the light-emitting section.Figure 1 shows a top view of the light-emitting section of a flash light source, where the dimensions of the light-emitting surface differ for each light-emitting section.Figure 1 shows a top view of the light-emitting section of a flash light source, where the dimensions of the light-emitting surface differ for each light-emitting section.This figure illustrates the relationship between the light-emitting part of the flash light source shown in Figure 1 and the illumination area provided in correspondence with the light-emitting part.Figure 1 is a cross-sectional view of the flash light source along the line A-A.This is another cross-sectional view along line A-A in the flash light source shown in Figure 1, where the unit first lens is integrated to form the first lens.This is an enlarged view of a portion of the cross-sectional view shown in Figure 4A.Figure 4A is a magnified cross-sectional view of the light-emitting section and the first lens shown in the cross-sectional view.This is an enlarged view of a portion of Figure 4A, showing how light from the central light-emitting part enters the optical lens through the central unit first lens.Figure 4A shows a cross-sectional view illustrating how light emitted from the central unit first lens illuminates the corresponding illumination area through an optical lens.This is an enlarged view of a portion of Figure 4A, showing how light from the surrounding light-emitting area enters the optical lens through the surrounding unit first lens.The cross-sectional view shown in Figure 4A illustrates how light emitted from the first peripheral lens illuminates the corresponding illumination area through the optical lens.This is a cross-sectional view of a flash light source according to Embodiment 2 of the present disclosure.This is a cross-sectional view of a flash light source according to Embodiment 3 of the present disclosure.This is a cross-sectional view of a flash light source according to Embodiment 4 of this disclosure.This is a cross-sectional view of a flash light source according to Embodiment 5 of the present disclosure.This is a cross-sectional view of a flash light source according to Embodiment 6 of the present disclosure.This is a cross-sectional view of the first lens provided in the flash light source according to Embodiment 7 of the present disclosure.This is a cross-sectional view of a flash light source according to Embodiment 8 of the present disclosure.This is a cross-sectional view of a modified example of a flash light source according to the present disclosure.This is a cross-sectional view of a modified example of a flash light source according to the present disclosure.This is a cross-sectional view of a modified example of a flash light source according to the present disclosure.This figure shows the lighting status when the light-emitting part in the 3rd row and 1st column is lit in the flash light source according to Embodiment 1 of this disclosure.This figure shows the lighting condition when the light-emitting part in the 3rd row and 1st column is lit, in a light source having the same configuration as the flash light source according to Embodiment 1 of this disclosure, except that it does not have a first lens.This figure shows the shortest distance L, shortest distance x, and angle α for the flash light source shown in Figure 1. Formula 1 The embodiments and examples for carrying out the invention described herein will be explained below with reference to the drawings. The flash light source, which is an example of a light source device described below, is intended to embody the technical concept of the invention described herein, and unless otherwise specified, the invention described herein is not limited to the flash light source described below. In each drawing, components with the same function may be denoted by the same reference numeral. For convenience, such as explaining key points or facilitating understanding, components may be shown separately as embodiments or examples, but partial substitution or combination of components shown in different embodiments or examples is possible. In the embodiments and examples described later, descriptions of matters common to those described above will be omitted, and only the differences will be explained. In particular, similar effects and benefits from similar configurations will not be mentioned sequentially in eac