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Lighting lens and lighting device equipped with the same

A technology of lens and light-emitting device, which is applied in the direction of lighting devices, components of lighting devices, lighting and heating equipment, etc., and can solve problems such as poor light utilization efficiency and difficulty in suppressing uneven color of the illuminated surface

Active Publication Date: 2013-08-21
ENPLAS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, even if such a plano-convex lens is used, the incident angle of white light incident on the outer peripheral portion of the convex surface of the plano-convex lens is large, and it is still difficult to suppress color unevenness on the irradiated surface caused by color separation.
Moreover, there is also the following problem: the light with a relatively large incident angle on the convex surface cannot enter the lens because of the high surface reflectance on the surface of the convex surface, so the light utilization efficiency is poor.

Method used

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  • Lighting lens and lighting device equipped with the same
  • Lighting lens and lighting device equipped with the same
  • Lighting lens and lighting device equipped with the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0050] Below, refer to Figure 2 to Figure 5 An embodiment of a spotlighting lens used in a spotlighting device as an illumination lens of the present invention will be described.

[0051] In addition, the same code|symbol is used for the part whose basic structure is the same as conventional or similar to this, and is demonstrated.

[0052] Such as figure 2 As shown, the spotlighting lens 7 of this embodiment is arranged opposite to the white light emitting diode 8 as a point light emitting device emitting white light, and together with the white light emitting diode 8 constitutes a spotlighting device.

[0053] In addition, the white light-emitting diode 8 in this embodiment has a light-emitting unit 10 that is, for example, compatible with figure 1 The structure shown is similarly composed of a combination of a light-emitting element of a blue light-emitting diode and a phosphor, and from the exit surface 11 of the light-emitting unit 10, white light with an exit angle o...

Embodiment

[0105] Next, prepare a total of eight kinds of test samples of spot lighting devices of Comparative Examples 1-3 and Examples 1-5 with white light-emitting diodes 8, and use such as Figure 6 In the measurement system shown, the chromaticity / illuminance measurement tests are carried out on the eight test samples respectively.

[0106] In this chromaticity / illuminance measurement test, after setting the test sample horizontally so that its optical axis is parallel to the vertical direction, the chromaticity and illuminance of the white light emitted from the test sample are measured by a color illuminance meter 29. The illuminance meter 29 was installed at a position having a radius of 50 cm from the emission surface 11 of the light emitting unit 10 of the test sample.

[0107] At this time, the angle between the optical axis of the test sample and the surface normal of the light-receiving surface of the color illuminance meter 29 (hereinafter referred to as the measurement ang...

Embodiment 1

[0134] The test sample of embodiment 1 is with figure 2 A test sample having the same structure as shown is composed of a white light emitting diode 8 and a spotlighting lens 7 arranged opposite to the light emitting side of the white light emitting diode 8 .

[0135] Below, use Figure 14 The spotlighting lens 7 used in the spotlighting device of this embodiment will be described.

[0136] When making the lens 7 for spotlighting of this embodiment, at first in order to make the light emitted from the white light emitting diode 8 incident on the lens 7 for spotlighting, a concave portion composed of the first incident surface 20 and the second incident surface 21 is designed. , as the structure of the LED facing face.

[0137] When designing the concave portion, the size of the first incident surface 20 is mainly determined based on the FWHM of the light emitted from the spotlighting device and the illuminance distribution of the irradiated light on the illuminated surface ...

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Abstract

A lighting lens can sufficiently suppress unevenness color and improve light use efficiency. This light lens has: first incidence surface 20 that is orthogonal to the optical axis; second incidence surface 21 that expands the radius toward the light emitting element 8 side; total reflection surface 22 that expands the radius toward the emitting side; first emission surface 24 that mainly emits light incident on first incidence surface 21, toward illuminated surface 18; and second emission surface 25 that emits light incident on a second incidence surface, toward illuminated surface 18, and forms second emission surface 25 such that positive power in second emission surface 25 is weaker than positive power of first emission surface 24.

Description

technical field [0001] The present invention relates to an illuminating lens and an illuminating device equipped with the lens, and particularly relates to an illuminating lens suitable for controlling the photometric distribution characteristic of light emitted from a light-emitting device emitting white light, and an illuminating device equipped with the lens. Background technique [0002] Conventionally, spot lighting devices that illuminate a specific area by irradiating light in a specific direction have been used for auxiliary lighting, ceiling lighting, or showcase lighting. [0003] In addition, in recent years, white light emitting diodes (white LEDs) have begun to be used as light sources of spot lighting devices from the viewpoint of power consumption reduction and environmental protection. [0004] The current mainstream of white light-emitting diodes is the use of phosphors, which are generally called blue-yellow-like white light-emitting diodes. [0005] here,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B3/08G02B17/08F21V5/04F21Y101/02
CPCG02B19/0061G02B19/0028F21Y2101/02F21V5/04F21Y2115/10
Inventor 中村真人
Owner ENPLAS CORP
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