Electronic and computational correction of chromatic aberration associated with an optical system used to view a color video display

Claim 3

The method of claim 1, wherein the color component image display control signals comprise deflection signals for a color field sequential display device that are generated one color component field at a time in a field by field time sequence, and wherein the step of differentially transforming the color component image display control signals is performed by applying the distortion function to a deflection signal during the time of a select color component field in the field by field time sequence.

Claim 4

The method of claim 2, wherein the distortion function defines a non-linear distortion of a deflection signal.

Claim 5

The method of claim 1, wherein the color component image display control signals comprise digital data representative of corresponding color components of a two-dimensional image pattern.

Claim 6

The method of claim 4, wherein the distortion function comprises a function for translating the digital data representative of a color component into a distorted image pattern.

Claim 7

The method of claim 5, wherein a plurality of different images are sequentially displayed by the color video display device at video rate and wherein an image pattern and a distorted image pattern are generated in real time for each of the plurality of images.

Claim 8

The method of claim 5, wherein a plurality of different images are sequentially displayed by the color video display device at video rate and wherein an image pattern and a distorted image pattern are generated off line prior to display of any of the plurality of images.

Claim 11

The method of claim 8 wherein the color component image display control signals comprise deflection signals for a color field sequential display device that are generated one color component field at a time in a field by field time sequence, and wherein the step of differentially transforming the color component image display control signals is performed by applying each distortion function to a deflection signal during the time of a different color component field in the field by field time sequence.

Claim 12

The method of claim 9, wherein each of the distortion functions defines a non-linear distortion of a deflection signal.

Claim 13

The method of claim 8, wherein the color component image display control signals comprise digital data representative of corresponding color components of a two-dimensional image pattern.

Claim 14

The method of claim 11, wherein each of the distortion functions comprises a function for translating the digital data representative of a color component into a distorted image pattern.

Claim 17

The method of claim 13, wherein the color video display device comprises a color matrix display.

Claim 20

The method of claim 15, wherein the color video display device comprises a color matrix display.

Claim 21

Apparatus for displaying an image to a viewer through an optical system having a chromatically variant optical aberration, comprising: a color video display device having a display surface disposed in the apparatus such that the optical system is interposed between the display surface and the viewer to form a virtual image of the display surface at a viewer eye position; and display driver circuitry electrically coupled to the color video display device to provide first color component image display control signals for a plurality of different color components of the color video display device, the display driver circuitry having at least one input for receiving second color component image display control signals from an image source, and circuitry which differentially transforms one of the first and second color component image display control signals to introduce different geometric distortion into each color component of an image displayed by the color video display device on the display surface, the different geometric distortions causing chromatically variant distortion in the image displayed on the display surface that compensates for the optical chromatic aberration of the optical system in the virtual image.

Claim 22

Apparatus for displaying an image to a viewer through an optical system having a chromatically variant optical aberration, comprising: a color video display device having a display surface disposed in the apparatus such that the optical system is interposed between the display surface and the viewer to form a virtual image of the display surface at a viewer eye position; and display driver circuitry electrically coupled to the color video display device to provide first color component image display control signals for a plurality of different color components of the color video display device, the display driver circuitry having at least one input for receiving second color component image display control signals from an image source, and circuitry which differentially transforms one of the first and second color component image display control signals to introduce different geometric distortion into each color component of an image displayed by the color video display device on the display surface, the different geometric distortions causing chromatically variant distortion in the image displayed on the display surface that compensates for the optical chromatic aberration of the optical system in the virtual image.

Claim 23

The apparatus of claim 17, wherein the first color component image display control signals comprise deflection signals for a color field sequential display device that are generated one color component field at a time in a field by field time sequence, and wherein the same display driver circuitry differentially transforms the color component image display control signals for a plurality of different color components of the color video display device by applying different distortion functions to the deflection signals during the times of different color component fields in the field by field time sequence.

Claim 24

The apparatus of claim 18, wherein the display driver circuitry differentially transforms the first color component image display control signals by introducing non-linear distortion into a deflection signal.

Claim 25

The apparatus of claim 17, wherein the second color component image display control signals comprise digital data representative of corresponding color components of a two-dimensional image pattern.

Claim 26

The apparatus of claim 20, wherein the display driver circuitry differentially transforms the second color component image display control signals by translating the digital data representative of a color component stored in a frame buffer into a distorted image pattern.

Claim 27

The method of claim 6 further comprising the steps of: determining viewer eye position with respect to an axis of the optical system; and defining the distortion function for a particular color component of the color video display device based on the chromatically variant optical aberration of the optical system and the determined viewer eye position.

Claim 28

The method of claim 12, wherein a plurality of different images are sequentially displayed by the color display device at video rate and wherein an image pattern and a distorted image pattern are generated in real time for each of the plurality of images.

Claim 29

The method of claim 23 further comprising the steps of: determining viewer eye position with respect to an axis of the optical system; and defining the distortion function for a particular color component of the color video display device based on the chromatically variant optical aberration of the optical system and the determined viewer eye position.

Claim 30

The method of claim 12, wherein a plurality of different images are sequentially displayed by the color display device at video rate and wherein an image pattern and a distorted image pattern are generated off line prior to display of any of the plurality of images.