US 8,698,701 B2Granted

Field sequential light source modulation for a digital display system

AssigneeDigital Display Innovations, LLC

InventorNeal D. Margulis

Life of this patent

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Abstract

A digital display system consists of an image modulator and multiple light modulators. An image processing system processes an incoming data stream, scans processed data to an image modulator and controls for the light modulators. Other user inputs and sensors are used to affect the processing and controls. The timing for scanning the processed data into the image modulators is controlled along with the intensity and wavelength of the light modulators. The display system may implement a spatial and temporal image processing, digital shutter controls, rolling shutter controls, sequential color output, adaptive dynamic sensor feedback, frame rate matching, motion compensated field sequencing and a variety of other techniques to produce a high quality display output. The resulting display has improved image consistency, enhanced color gamut, higher dynamic range and is better able to portray high motion content.

Claims5

Dependent claims

A method of displaying images on a flat panel display, comprising:

positioning three or more different wavelength LED light sources at different locations relative to the image modulator pixels in said display;
separately, by light source controls, varying brightnesses of said light sources within different regions of said display;
scanning pixel values into individually controllable pixels in an image modulator array having a modulator resolution, during an image modulator scanning time;
and
using one or more controllers for
receiving an input data stream containing image data,
spatial processing image data for a display frame into three or more image color fields each corresponding to a different wavelength,
filtering said image color fields to match said image modulator resolution, and
filtering image data to a light source resolution, lower than said image modulator resolution, for controlling said LED light sources;
wherein each of said image color fields has both a duration and an LED color combination which can be varied by said light source controls switching LEDs for successive color fields.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/600,165Filed 30 Aug 2012 · continuation
Priority: 20 Jun 2005
Published: US 2012/0327139 A127 Dec 2012
Granted: 15 Apr 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification20 codes

G03B 21/206
Lamp housings: control of light source other than position or intensity
G03B 21/005
Projectors or projection-type viewers; Accessories therefor: projectors using an electronic spatial light modulator but not peculiar thereto
G03B 21/2033
Characterised by the light source: lED or laser light sources
G03B 21/26
Details: projecting separately subsidiary matter simultaneously with main image

Family

Application11/158,476Parent of this continuation-in-part · filed 20 Jun 2005
Application11/255,353Parent of this continuation-in-part · filed 21 Oct 2005
Application11/294,173Parent of this continuation · filed 5 Dec 2005
Application12/027,923Parent of this continuation · filed 7 Feb 2008
US 7,364,306 B2Parent of this continuation · filed 29 Apr 2008
US 7,404,645 B2Parent of this continuation-in-part · filed 29 Jul 2008
US 8,279,138 B1Parent of this continuation · filed 2 Oct 2012
US 2012/0327139 A1Pre-grant publication · published 27 Dec 2012
Application11/294,173Parent of this continuation-in-part
US 2007/0035706 A1Published application
US 2007/0035707 A1Published application
US 8,698,701 B2This patent

From the US filing history. Foreign family members aren’t listed.