Tweet
Barco launched its F-90, and the Residential version Loki, laser-phosphor pixel shifting 4K projector at the ISE trade show in Amsterdam last month. It is using the optical actuator technology developed by TI, but developed its own processing technology. TI told me the pixel shifting technology was in principle compatible with any of its DMDs, but it was only developing the 0.67" 4K offer. We had seen another pixel shifting implementation using the 0.9" WQXGA DMD, Quad Pixel Drive by Panasonic last year and this year Barco launched its implementation of 4K from a standard DMD and (optical) shifting technology.
Barco was also kind enough to provide this whitepaper that explains both the optical actuator and Barco's SSP image processing technology. TI uses its own processing technology in the 0.67"platform it refers to its 4K technology as 'XPR Technology'
Interesting whitepaper on Texas Instruments’ pixel shifting technology together with the superb Single Step Processing (SSP™) image processing technique from Barco. Barco SSP replaces TI's own XPR Technology as found in the new 0.67" 4K (2x4.15 million pixels/micromirrors) DMD plus mirror offer.
This says the:
"The image presented on the DLP® chip is synchronized with the (optical) pixel shifting device − called the Optical Actuator − with the result that,
after the pixel shift of half a pixel over the diagonal, a Processed Display Resolution of 5120x3200 addressable pixels is created. This means an
addressable canvas of 16 million pixels. These 16 million pixels guarantee the accurate and (quasi) lossless formation of the 4K UHD image on the screen, which includes all of the 4K content that was present in the 4K input. And this is achieved without using an expensive native 4K DLP® chip but with a more affordable DLP® chip and the Optical Actuator."
Eventhough the diagonal shift by half a pixel as shown in figure 4 shows there will be overlap between the first set of pixels and the second optically off-set pixels.
"To summarize: When 4K content is fed to the projector, that complete 4K input information is processed in a single step (SSP™) and presented to the single chip (in a single-chip DLP® projector) or to the 3 DLP® chips (in a 3-chip DLP® projector). Barco’s unique Single Step Processing (SSP™) image processing technique includes all possible electronic manipulations of the image - warping, blending, scaling, preparing the image for the pixel shifting device, gamma correction, color correction, etc. − and integrates them into a single module. Barco’s SSP™ has clear advantages over sequential processing"
Barco was also kind enough to provide this whitepaper that explains both the optical actuator and Barco's SSP image processing technology. TI uses its own processing technology in the 0.67"platform it refers to its 4K technology as 'XPR Technology'
Interesting whitepaper on Texas Instruments’ pixel shifting technology together with the superb Single Step Processing (SSP™) image processing technique from Barco. Barco SSP replaces TI's own XPR Technology as found in the new 0.67" 4K (2x4.15 million pixels/micromirrors) DMD plus mirror offer.
This says the:
"The image presented on the DLP® chip is synchronized with the (optical) pixel shifting device − called the Optical Actuator − with the result that,
after the pixel shift of half a pixel over the diagonal, a Processed Display Resolution of 5120x3200 addressable pixels is created. This means an
addressable canvas of 16 million pixels. These 16 million pixels guarantee the accurate and (quasi) lossless formation of the 4K UHD image on the screen, which includes all of the 4K content that was present in the 4K input. And this is achieved without using an expensive native 4K DLP® chip but with a more affordable DLP® chip and the Optical Actuator."
Eventhough the diagonal shift by half a pixel as shown in figure 4 shows there will be overlap between the first set of pixels and the second optically off-set pixels.
"To summarize: When 4K content is fed to the projector, that complete 4K input information is processed in a single step (SSP™) and presented to the single chip (in a single-chip DLP® projector) or to the 3 DLP® chips (in a 3-chip DLP® projector). Barco’s unique Single Step Processing (SSP™) image processing technique includes all possible electronic manipulations of the image - warping, blending, scaling, preparing the image for the pixel shifting device, gamma correction, color correction, etc. − and integrates them into a single module. Barco’s SSP™ has clear advantages over sequential processing"