Illumination device with movement elements

• US 9,121,574 B2
• Filed: 02/23/2012
• Issued: 09/01/2015
• Est. Priority Date: 02/25/2011
• Status: Active Grant

• Current Assignee: TriLite Technologies GmbH
• Original Assignee: TriLite Technologies GmbH
• Inventors: Swatek, Alexander, Fidler, Franz, Reitterer, Joerg
• Primary Examiner(s): LUU, THANH X
• Application Number:
  US14/001,386
• Publication Number:
  US 20130327966A1
• Time in Patent Office: 1,286 Days
• Field of Search: 250/578.1
• US Class Current: 1/1
• CPC Class Codes: B60Q 1/143 combined with another condition, e.g. using vehicle recognition from camera images or activation of wipers
• CPC Class Codes: B60Q 1/44 for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
• CPC Class Codes: B60Q 2300/056 Special anti-blinding beams, e.g. a standard beam is chopped or moved in order not to blind
• CPC Class Codes: F21K 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: G02B 26/04 by periodically varying the intensity of light, e.g. using choppers shutters, diaphragms for cameras G03B9/00; devices for eliminating or reducing the effect of flicker in projection systems G03B21/40
• CPC Class Codes: G02B 26/0808 by means of one or more diffracting elements
• CPC Class Codes: G02B 26/0816 by means of one or more reflecting elements
• CPC Class Codes: G02B 30/33 involving directional light or back-light sources
• CPC Class Codes: G02B 30/35 using reflective optical elements in the optical path between the images and the observer
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2360/141 the light conveying information used for selecting or modulating the light emitting or modulating element
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 3/001 using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background slide projectors per se G03B23/00 = 42 HP
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/007 Use of pixel shift techniques, e.g. by mechanical shift of the physical pixels or by optical shift of the perceived pixels
• CPC Class Codes: G09G 3/035 for flexible display surfaces
• CPC Class Codes: G09G 3/3426 the different display panel areas being distributed in two dimensions, e.g. matrix
• CPC Class Codes: H04N 13/315 : the parallax barriers being time-variant
• CPC Class Codes: H04N 13/32 : using arrays of controllable light sources; using moving apertures or moving light sources
• CPC Class Codes: H04N 13/322 : using varifocal lenses or mirrors
• CPC Class Codes: H04N 13/324 : Colour aspects
• CPC Class Codes: H04N 13/354 : for displaying sequentially
• CPC Class Codes: H04N 13/366 : using viewer tracking
• CPC Class Codes: H04N 2013/403 : the images being monoscopic

Abstract

An illumination device (A) for the illumination of illumination zones (BZ) with different light intensity and/or color temperature by means of at least one light source (L), wherein per light source (L) there is provided at least one illumination modification means (VM) in the optical path between the light source (L) and the illumination zones (BZ) having at least one movement element (BR, BV, LI, L), which is arranged movably in the illumination device (A) and which is adapted to selectively deviate and/or cover the light emitted by the at least one light source (L) by means of control means with an illumination frame rate (R) for a subsequent illumination of the illumination zones (BZ), wherein the control means are adapted to control the light intensity of each light source according to the illumination zone (BZ) currently illuminated.

Claims

1. An illumination device, comprising:

a common substrate,

at least two light sources for emitting light beams,

a micro lens configured to collimate said light beams in at least one axis, and

an illumination modification means mounted on the common substrate in a path of the collimated light beams and having at least one movable element configured to selectively deflect or cover said collimated light beams,

wherein the light sources are mounted on a common submount, wherein the common submount and the micro lens are mounted on a heatsink interface,

wherein the heatsink interface is mounted on the common substrate, and

wherein the at least two light sources are configured to emit different colors and are mounted on the common submount at different distances from the micro lens to compensate for a refractive index of the micro lens that is dependent on wavelength.

2. The illumination device according to claim 1, wherein the at least two light sources are three laser diodes of the primary colors red, green and blue.

3. The illumination device according to claim 1, wherein the common submount is made of a material that substantially does not deform upon heating.

4. The illumination device according to claim 1, wherein the heatsink interface is made of a material that substantially does not deform upon heating.

5. The illumination device according to claim 1, wherein each light source of the at least two light sources has at least one photodiode for measuring the optical output of the light source.

6. The illumination device according to claim 5, wherein the at least one photodiode is mounted together with the at least two light sources on the common submount.

7. The illumination device according to claim 5, wherein each light source of the at least two light sources is a laser diode with a front facet and a rear facet, at the rear facet of which the at least one photodiode determines the optical output of the laser diode at the front facet thereof.

8. The illumination device according to claim 7, wherein an active surface of the at least one photodiode is tilted with respect to the rear facet of the laser diode.

9. The illumination device according to claim 1, wherein the micro lens is a FAC lens.

10. The illumination device according to claim 1, wherein the at least one movable element is a micro mirror movable in one or two directions.

11. The illumination device according to claim 10, wherein the micro mirror is a MEMS device.

12. The illumination device according to claim 1, wherein the illumination modification means has at least one diffuser, beam splitter or diverging lens for enlarging the divergence angle of the light beams.

13. An illumination device, comprising:

a substrate,

at least two light sources for emitting light beams,

a micro lens configured to collimate said light beams in at least one axis, and

at least one movable element mounted on the substrate in a path of the collimated light beams and configured to selectively deflect or cover said collimated light beams,

wherein the at least two light sources are mounted on a common submount, wherein the common submount and the micro lens are mounted on a heatsink interface,

wherein the heatsink interface is mounted on the substrate, and

wherein the at least two light sources are configured to emit different colors and are mounted on the common submount at different distances from the micro lens to compensate for a refractive index of the micro lens that is dependent on wavelength.

14. The illumination device according to claim 13, wherein each light source of the at least two light sources has at least one photodiode for measuring the optical output of the light source.

15. The illumination device according to claim 13, wherein the at least one movable element includes a micro mirror movable in one or two directions.

16. The illumination device according to claim 13, further comprising:

at least one diffuser, beam splitter or diverging lens for enlarging the divergence angle of the light beams.