A device for optically focusing a projection image projected by a projector includes a detector for controlled creation of at least one observation shot of the projection image over a time period, a processing unit for defining at least one image section within the projection image generated by the projector, where the image section is modulated over the time period with respect to the optical power and/or the optical spectrum thereof, and the at least one image section of the projection image is essentially synchronous compared with the corresponding respective image section of the observation shot, where the processing unit also calculates a variable derived from the comparison of the respective image sections and a control signal derived from the derived variable, and outputs the control signal to a focusing device of the projector.

Claims

15 · 2 independent · depth 5

15 granted claims

›1.independentA device for optically focusing a projection image projected by a projector, comprising,na detector for time-controlled creation of at least one obser…+13

›2.↳ 1The device as claimed in claim 1, wherein exactly one image region of the projection image is defined for modulation of a time period with respect to …d2+1

›3.↳ 1The device as claimed in claim 1, wherein a plurality of image regions of the projection image is defined for respective modulation of a time period w…d2+6

›4.↳ 3The device as claimed in claim 3, wherein each of the at least two image regions of the projection image are proximally located.d3+1

›5.↳ 3The device as claimed in claim 3, wherein a respective image region is modulated with a respective identical waveform; and wherein a phase shift is pr…d3+2

›10.↳ 3The device as claimed in claim 3, wherein the modulation occurs with a frequency of over 70 Hertz.d3

›11.↳ 1The device as claimed in claim 1, further comprising:na device for performing intensity normalisations to adjust an intensity of modulated image regio…d2

›12.↳ 1The device as claimed in claim 1, wherein further comprising:na device for performing intensity normalisations;wherein a measured value for the optica…d2

›13.↳ 1The device as claimed in claim 1, further comprising:na device for performing intensity normalisations;wherein a peak value for the optical power of t…d2

›14.↳ 1The device as claimed in claim 1, further comprising:na device for intensity normalisations;wherein spatially limited regions having at least one of a…d2

›15.independentA method for optically focusing a projection image projected by a projector, comprising:ncontrolling, by a detector, creation of at least one observat…

Classifications

6 codes

IPC · International Patent Classification

Section G — Physics

G09G5/10
G09G5/02
G03B21/53

Section H — Electricity

H04N9/31

USPC · US Patent Classification

345/694359/625

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Pendency

3.1 y

1,140 days filing → grant

Office actions

none on record

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no RCE

Examiner

Ricardo L Osorio

art unit 2692 · TC 2600

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Citations: 7 back · 0 forward

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Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20140028742 A1	30 Jan 2014

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