Optical compensation for ghosting in stereoscopic displays
View Patent ↗A method for reducing crosstalk in stereoscopic displays comprises providing a first first-eye image, a compensated image of the first first-eye image, a first other-eye image, and a compensated image of the first other-eye image; displaying each of the images at least once during a single frame flash sequence, wherein the first first-eye image is displayed to a first eye, the compensated image of the first first-eye image is displayed to another eye, the first other-eye image is displayed to the another eye, and compensated image of the first other-eye image is displayed to the first eye; wherein the compensated images can be displayed simultaneously and/or at least one of the compensated images or eye images can be displayed more than one time during a single frame flash sequence.
1. A display comprising:
video data interface adapted to receive video data and form separate frames of first eye image data and a second eye image data,
buffer adapted to receive and write into memory the image data from the video data interface;
image compensator adapted to generate a compensated second eye image data for display to a first eye that is responsive only to the second eye image data and a compensated first eye image data for display to a second eye that is responsive only to the first eye image data; and
display controller adapted to cause the first eye image data and the compensated second eye image data to be displayed to the first eye, one after the other, and then to cause the second eye image data and the compensated first eye image data to be displayed to the second eye, one after the other.
2. The display of claim 1 further comprising a shift register that control pixels of the display.
3. The display of claim 1 wherein the compensated first and second eye image data are inverse intensity data of the first and second eye image data, respectively.
4. The display of claim 1 wherein the display is a digital micromirror device.
5. The display of claim 4 wherein
data output to control the micromirrors for the first eye is a waveform pattern for the first eye image data and an inverted form of a waveform of the second eye image data; and
the data output to control the micromirrors for the second eye is a waveform pattern for the second eye image data and an inverted form of waveform of the first eye image data.
6. The display of claim 1 wherein the display is adapted to flash the first eye image data and the compensated second eye image data combination to the first eye and the second eye image data and the compensated first eye image data combination to the second eye more than once in alternating fashion.
7. The display of claim 1 wherein the display is adapted to flash the first eye image data and the compensated second eye image data combination to the first eye and the second eye image data and the compensated first eye image data combination to the second eye more than once in alternating fashion, wherein the compensated first and second eye image data are inverse intensity data of the first and second eye image data, respectively.
8. The display of claim 5 wherein
the display is adapted to flash the first eye image data and the compensated second eye image data combination to the first eye and the second eye image data and the compensated first eye image data combination to the second eye more than once in alternating fashion; and
the compensated first and second eye image data are inverse intensity data of the first and second eye image data, respectively.
9. The display of claim 4 wherein
data output to control the micromirrors for the first eye is a waveform pattern for the first eye image data and an inverted form of a waveform of the second eye image data; and
the data output to control the micromirrors for the second eye is a waveform pattern for the second eye image data and an inverted form of waveform of the first eye image data; and
the intensity associated with the micromirrors is responsive to the waveform patterns and expressed by multi-bit binary values having a most significant bit, intermediate bits and a least significant bit.
10. The display of claim 1 further comprising a balancing means that establishes a ratio of duration of time or intensity that the first and second eye image data are displayed to that of the compensated second eye image data and compensated first eye image data, respectively.