Hybrid spatial‐temporal color synthesis and its applications

Silverstein, Louis D.; Roosendaal, S. J.; Jak, Martin

doi:10.1889/1.2166834

Cited by 9 publications

(5 citation statements)

References 16 publications

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“…It is commonly understood that when the display refresh rate is beyond the temporal acuity of the human visual system (saying >60Hz as an example [6]) and the viewer does not move his/her eyes, the human visual system will fuse the two field images and perceive a normal color image, as shown in Figure 1. However, when the viewer moves his/her eyes the field images will displace on the retina and an annoying color breakup will be perceived.…”

Section: Local Primary Desaturation Backlightmentioning

confidence: 99%

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65.2: A 120Hz Spatio‐Temporal Color Display Without Color Breakup

Zhang

Langendijk

Hammer

et al. 2011

Symp Digest of Tech Papers

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A color breakup reduction method is proposed for a 120Hz spatio-temporal color display. It has a 1.5×~3× high transmission ratio and a 1.5× high resolution compared to a normal liquid crystal display (LCD) with RGB (red, green, and blue) color filter. It can be implemented on a 120Hz LCD with two-color filter and a local dimming RGB LED (light emitting diode) backlight. It algorithmically suppresses the color breakup by reducing color differences between fields with a local-primary desaturation protocol in a segmented backlight.

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Section: Local Primary Desaturation Backlightmentioning

confidence: 99%

“…This requires a fast-response LC panel. In [6,7], a spatial-temporal color (STC) display was proposed, which has two-color filters (2CF) and two fields (2F). A 2F2CF STC display has a 1.5x~3x higher light transmission and 1.5x higher resolution compared to a conventional LCD with RGB color filters.…”

Section: Introductionmentioning

confidence: 99%

65.2: A 120Hz Spatio‐Temporal Color Display Without Color Breakup

Zhang

Langendijk

Hammer

et al. 2011

Symp Digest of Tech Papers

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show abstract

“…10,11 The approach is fundamental and can be adapted to most color display technologies, including direct-view matrix displays of both the non-emissive and emissive types, projection displays with matrix image sources and near-to-eye virtual displays. The general approach reduces the number of primary color sub-pixel elements from 3 to 2, arranges the 2 primary sub-pixel elements in a 2-D checkerboard mosaic and synthesizes the remaining 3rd primary color element by temporal synthesis.…”

Section: Synthesizing Colors In Both Space and Timementioning

confidence: 99%

Display color synthesis in the space-time continuum

Silverstein

2010

SPIE Proceedings

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A common problem for all color displays, regardless of whether they are of the self-luminous or non-self-luminous type, is the synthesis of a full-color image from a limited set of primary colors. Several approaches to color synthesis have been employed for electronic displays. The most successful of these conform to the principles of additive color mixture and include optical superposition, spatial synthesis and temporal synthesis. In order to understand the principles of color generation in electronic display systems, as well as the relative strengths and weaknesses of synthesizing color in the space and time domains, I first consider the visual bases which allow such color synthesis to occur. Although basic approaches to color synthesis have served the evolution of display technology well up to recent times, I present the argument that the continued evolution of display technology toward higher display resolution and enhanced color quality has exposed the limitations of both spatial color synthesis and temporal color synthesis and raises questions as to whether either method for synthesizing color can alone fully satisfy the ever increasing demands on display image quality. Clearly, new approaches to color synthesis are needed to sustain the evolution of display technology, and I describe recent concepts with the potential for pushing the horizons of color display image quality and reducing the costs of future color displays. These include hybrid spatial-temporal color synthesis and 3D color synthesis as well as variants of these approaches.

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“…5 Instead, the FSC display flashes the backlight sequentially to red, green, and blue, so it uses temporal color synthesis instead of spatial color synthesis. 6 Consequently, the FSC display is expected to be three times as efficient as a conventional LCD. Besides, a FSC display needs only one-third the amount of (sub) pixels of a conventional LCD to reach the same image resolution, which potentially reduces production cost and is well suited for 3-D display applications.…”

Section: Introductionmentioning

confidence: 99%

A field‐sequential‐color display with a local‐primary‐desaturation backlight scheme

Zhang¹,

Lin²,

Langendijk³

2011

J Soc Info Display

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Abstract— Field‐sequential‐color technology eliminates the need for color filters in liquid‐crystal displays (LCDs) and results in significant power savings and higher resolution. But the LCD suffers from color breakup, which degrades image quality and limits practical applications. By controlling the backlight temporally and spatially, a so‐called local‐primary‐desaturation (LPD) backlight scheme was developed and implemented in a 180‐Hz optically compensated bend (OCB) mode LCD equipped with a backlight consisting of a matrix of light‐emitting diodes (LEDs). It restores image quality by suppressing color breakup and saves power because it has no color filter and uses local dimming. A perceptual experiment was implemented for verification, and the results showed that a field‐sequential‐color display with a local‐primary‐desaturation backlight reduced the color breakup from very annoying to not annoying and even invisible.

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Hybrid spatial‐temporal color synthesis and its applications

Cited by 9 publications

References 16 publications

65.2: A 120Hz Spatio‐Temporal Color Display Without Color Breakup

65.2: A 120Hz Spatio‐Temporal Color Display Without Color Breakup

Display color synthesis in the space-time continuum

A field‐sequential‐color display with a local‐primary‐desaturation backlight scheme

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