Display device with movement elements for obtaining a high resolution and/or a 3D effect

• US 9,689,551 B2
• Filed: 02/23/2012
• Issued: 06/27/2017
• 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): Eisen, Alexander
• Assistant Examiner(s): Yang, Nan-Ying
• Application Number:
  US14/001,352
• Publication Number:
  US 20130329021A1
• Time in Patent Office: 1,951 Days
• 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

A display device (A) for the display of image information, which consists of at least one or a plurality of picture elements and may be modified by means of a frame rate (R), having at least one light source (L) for the generation of a picture element of the image information, characterized in that there are provided picture element modification means (VM) having movement elements (BR, BV, LI, L), which are movably arranged with at least the frame rate (R) in the display device (A) and which are adapted to selectively deflect and/or cover the light emitted by the at least one light source (L) for the viewer (LA, RA) of the display device (A) in order to generate per light source (L) of the display device (A) at least twice the number of picture elements as extension picture elements (1, 2, 3, 4, 5, 6) for the display of the image information, wherein the light emitted by the at least one light source (L) is modified with at least twice the frame rate (R) as light source frequency (f_L).

Claims

1. A display device for the display of 2D or 3D image information, which image information includes a plurality of picture elements and may be modified with a frame rate, comprising:

a plurality of light sources, each light source being configured to emit light modified with at least twice the frame rate, and

a plurality of picture element modification means, each picture element modification means assigned to a corresponding light source of the plurality of light sources and not to another light source of the plurality of light sources,

each picture element modification means of the plurality of picture element modification means having a movement element movable with at least the frame rate and adapted to selectively deflect and/or cover the light emitted by the assigned light source, in order to generate per light source at least twice the number of picture elements for the display of the image information,

wherein a first moveable element of a first picture element modification means of the plurality of picture element modification means is individually and independently movable from a second movement element of a second picture element modification means of the plurality of picture element modification means,

wherein each picture element modification means has at least one movable mirror that is movable in one direction or in two directions,

wherein the display device further comprises a control circuit configured to position the movement elements with at least the frame rate into N_BZ different deflecting positions for achieving an autostereoscopic 3D effect in N_BZ viewing zones at a viewing distance from the display device, wherein N_BZ corresponds to the number of viewing zones.

2. The display device according to claim 1, wherein each picture element modification means is configured to deflect the light of its assigned light source in a time multiplexed manner into at least two different directions, and wherein the control circuit is configured to control the picture element modification means in dependence on image information sent to the light sources to generate one picture element of the image information per light source and direction.

3. The display device according to claim 2, further comprising, for each picture element modification means, one extension picture element in each of the different directions said picture element modification means can deflect light into, which extension picture element emits light deflected thereto from an exit area of the extension picture element.

4. The display device of claim 3, wherein said extension picture element diverges the light emitted from its exit area under a divergence angle.

5. The display device according to claim 1, wherein each light source comprises a set of three laser diodes or LEDs of the three primary colors red, green, and blue.

6. The display device according to claim 1, wherein each pair of a light source and an assigned picture element modification means is mounted on a common substrate, the pairs being arranged in an array to form the display device.

7. The display device according to claim 1, wherein the at least one mirror is realized as a micro-electro-mechanical system.

8. The display device according to claim 1, wherein each light source has at least one photodiode for measuring the optical output of the light source.

9. The display device according to claim 8, wherein each light source of the plurality of light sources has at least one laser diode with a front facet and a rear facet, at the rear facet of which the photodiode determines the optical output of the laser diode at the front facet thereof.

10. The display device according to claim 9, wherein the surface normal of the active surface of the photodiode is arranged in a tilted position with respect to the optical axis of the laser diode.

11. The display device according to claim 1, wherein each picture element modification means has at least one micro lens which is arranged in the optical path of the light emitted by the assigned light source.

12. The display device according to claim 11, wherein each light source of the plurality of light sources comprises a set of three laser diodes or LEDs of the three primary colors red, green and blue, and wherein each laser diode or LED has a different distance from the micro lens in order to compensate for the refractive index of the micro lens that is dependent on the wavelength.

13. The display device according to claim 11, wherein the micro lens is formed by a FAC (fast axis collimator) lens.

14. The display device according to claim 1, wherein the picture element modification means have at least one beam splitter and/or a diverging lens for enlarging the viewing area of the display device.

15. The display device according to claim 1, wherein the display device is formed curved in a concave or convex way.

16. A display device for the display of 2D or 3D image information, the image information including a plurality of picture elements and may be modified with a frame rate, the display device comprising:

a plurality of light sources, each light source configured to emit light modified with at least twice the frame rate, and

a plurality of movement elements, each movement element associated with a corresponding one of the light sources of the plurality of light sources,

each movement element movable with at least the frame rate and adapted to selectively deflect and/or cover the light emitted by the associated light source in order to generate per light source at least twice the number of picture elements for the display of the image information,

wherein a first moveable element of the plurality of movement elements is individually and independently movable from a second movement element of the plurality of movement elements,

wherein each movement element includes at least one movable mirror that is movable in at least one direction,

wherein the display device further comprises a control circuit configured to position the movement elements with at least the frame rate into N_BZ different deflecting positions for achieving an autostereoscopic 3D effect in N_BZ viewing zones at a viewing distance from the display device, wherein N_BZ corresponds to the number of viewing zones.

17. The display device according to claim 16, wherein each movement element is configured to deflect the light of the associated light source in a time multiplexed manner into at least two different directions, and wherein the control circuit is configured to control the plurality of movement elements in dependence on image information sent to the light sources to generate one picture element of the image information per light source and direction.

18. The display device according to claim 17, further comprising, for each movement element, one extension picture element in each of the different directions said movement element can deflect light into, which extension picture element emits light deflected thereto from an exit area of the extension picture element.

19. The display device according to claim 16, wherein each light source has at least one photodiode for measuring the optical output of the light source.