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US 9,176,367 B2Granted
Illumination device and display unit including a light source section, first and second uniformization optical members, an optical device, and a drive section
AssigneeSony Corporation
InventorsKazumasa Kaneda, Koji Miura, Toshifumi Yasui, Kazuyuki Takahashi
Life of this patent
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Abstract
An illumination device includes: a light source section including a laser light source; a first uniformization optical member receiving light from the light source section; a second uniformization optical member receiving light from the first uniformization optical member; an optical device disposed on an optical path of outgoing light from the light source section; and a drive section vibrating the optical device.
Claims25
An illumination device comprising:
- a light source section including a laser light source;
- a first uniformization optical member receiving light from the light source section;
- a second uniformization optical member receiving light from the first uniformization optical member;
- an optical device disposed on an optical path of outgoing light from the light source section;
- and
- a drive section vibrating the optical device;
- wherein the optical device is disposed on an optical path between the first uniformization optical member and the second uniformization optical member;
- and
- wherein the second uniformization optical member includes a plurality of unit cells which are two-dimensionally arranged, and
- an expression (1) is satisfied:
- {6×f×tan(θf)}>Pf (1)
- where f is a focal length of the unit cell in the second uniformization optical member, Pf is a pitch of the unit cell in the second uniformization optical member, θf is a marginal ray angle in a light flux emitted from the optical device to enter the second uniformization optical member.
9 more elements
An illumination device comprising:
- a light source section including a laser light source;
- a first uniformization optical member receiving light from the light source section;
- a second uniformization optical member receiving light from the first uniformization optical member;
- an optical device disposed on an optical path of outgoing light from the light source section;
- and
- a drive section vibrating the optical device, wherein
- the second uniformization optical member separately includes a plurality of first unit cells arranged on a light-incident surface thereof and a plurality of second unit cells arranged on a light-exit surface thereof,
- each of the first unit cells has an anisotropic shape with a major-axis direction along a first direction and a minor-axis direction along a second direction, and
- each of the second unit cells has a shape extending along both the first direction and the second direction.
6 more elements
An illumination device comprising:
- a light source section including a laser light source;
- a first uniformization optical member receiving light from the light source section;
- a second uniformization optical member receiving light from the first uniformization optical member;
- an optical device disposed on an optical path of outgoing light from the light source section;
- a drive section vibrating the optical device;
- a light-receiving device disposed on an optical path in a stage following the first uniformization optical member;
- and
- a control section controlling an outgoing light amount in the laser light source based on a light amount of a light flux received by the light-receiving device.
5 more elements
Dependencies are inferred from the claim text.