LIGHT IRRADIATION DEVICE

• US 20100315814A1
• Filed: 06/02/2010
• Published: 12/16/2010
• Est. Priority Date: 06/12/2009
• Status: Abandoned Application

• Current Assignee: Ushio Denki Kabushiki Kaisha (Ushio Incorporated)
• Original Assignee: Ushio Denki Kabushiki Kaisha (Ushio Incorporated)
• Inventors: KABUKI, Kiyoyuki, KATAOKA, Ken, HATA, Hiroshige, YANO, Kazuaki, ISHIDA, Kenji
• Application Number:
  US12/791,995
• Publication Number:
  US 20100315814A1
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21K 9/69 Details of refractors forming part of the light source
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0066 in the form of an LED array
• CPC Class Codes: G02B 27/0961 Lens arrays lens arrays per se G02B3/0006
• CPC Class Codes: G02B 3/0043 Inhomogeneous or irregular arrays, e.g. varying shape, size, height

Abstract

In order to avoid irregular irradiation of a substrate, a light irradiation device is provided, comprised of a plurality of adjacently arranged segment light sources wherein a plurality of LEDs is arranged on a substrate, wherein said segment light source comprises an integrator lens arranged such as to be irradiated with light of said plurality of LEDs and a condenser lens arranged such as to be irradiated with light transmitted by said integrator lens, said integrator lens consisting of a plurality of cell lenses, whose aperture sizes at that side of said integrator lens that opposes said LEDs have different dimensions. Alternatively, a mask is provided at that side of said integrator lens which opposes said LEDs, said mask having apertures at positions corresponding to a respective one of said cell lenses, the mask apertures having sizes of different dimensions.

Claims

1. A light irradiation device, comprised of a plurality of adjacently arranged segment light sources wherein a plurality of LEDs is arranged on a substrate,

wherein said segment light source comprises an integrator lens arranged such as to be irradiated with light of said plurality of LEDs and a condenser lens arranged such as to be irradiated with light transmitted by said integrator lens, said integrator lens consisting of a plurality of cell lenses, whose aperture sizes at that side of said integrator lens that opposes said LEDs have different dimensions.

2. The light irradiation device according to claim 1, wherein one of corner radii and/or corner cuts are provided at the corner parts of the cell lenses at the side which opposes said LEDs.

3. The light irradiation device according to claim 1, wherein the cell lenses are arranged in groups, each group comprising cell lenses having different aperture sizes.

4. The light irradiation device according to claim 3, wherein the groups of cell lenses are arranged in a regular manner.

5. A light irradiation device, comprised of a plurality of adjacently arranged segment light sources wherein a plurality of LEDs is arranged on a substrate,

wherein said segment light source comprises an integrator lens arranged such as to be irradiated with light of said plurality of LEDs and a condenser lens arranged such as to be irradiated with light transmitted by said integrator lens, said integrator lens consisting of a plurality of cell lenses, and wherein a mask is provided at that side of said integrator lens which opposes said LEDs, said mask having apertures at positions corresponding to a respective one of said cell lenses, the mask apertures having sizes of different dimensions.

6. The light irradiation device according to claim 5, wherein one of corner radii and/or corner cuts are provided at the corner parts of the mask apertures at the side which opposes said LEDs.

7. The light irradiation device according to claim 5, wherein the mask apertures are arranged in groups, each group comprising mask apertures having different aperture sizes.

8. The light irradiation device according to claim 7, wherein the groups of mask apertures are arranged in a regular manner.