Flicker-free shutter glasses for full high-definition 3D viewing

Kim, Daesik; Shestak, Sergey

doi:10.1117/2.1201306.004810

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“…Recently we developed an SG, which does not produce flicker from ambient light sources. 3 This paper is focused on a different concept using a combination of active glasses and a patterned retarder.…”

Section: Introductionmentioning

confidence: 99%

Stereoscopic three-dimensional television using active glasses with switchable refraction

Shestak

Kim

Cha

2015

J. Electron. Imaging

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Abstract. We have devised a full-resolution stereoscopic television system incorporating both a patterned retarder and active glasses. Selective vision of the left image by the left eye and the right image by the right eye is achieved by a conventional combination of a patterned retarder and left and right polarized filters. Full resolution is provided by the active components of the glasses acting as a switchable refractive-type beam displacer. Pairs of line-interleaved images are displayed on an LCD screen sequentially at a frame rate of 120 Hz. With the help of active refraction glasses, the viewer can see full-resolution stereoscopic images as if they are displayed in an interlaced manner. Active glasses are flicker-free. Measured stereoscopic crosstalk is 0.6%, which is defined only by the performance of the patterned retarder. 1 Introduction A large share of recently manufactured LCD televisions (TVs) is capable of displaying stereoscopic three-dimensional (3-D) content. Two types of stereoscopic TVs dominate the consumer market, one based on shutter glasses (SGs) and the other on film patterned retarders (FPRs). Both SG and FPR TV systems are not entirely free of disadvantages. They simply combine relatively low manufacturing complexity and low cost.An SG stereoscopic TV system provides full-resolution stereoscopic images. It is based on time-sequential displaying of left and right images followed by synchronous blocking of the right and left eyes by the corresponding shutter of the SG. To provide low crosstalk stereoscopic images without visible ghosting the LCD display incorporates an image panel with a short response time and a backlight unit, operating in a short-pulse blinking mode.1 Usually, the LCD panel of an SG system features an increased frame rate at least 100 to 120 Hz in order to reduce visible image flicker. However, the presence of a bright light source inside the viewing field of the SG can cause perceivable flicker.An FPR system is based on displaying stereoscopic images in a row-interleaved mode, coding of odd and even rows with an alternating polarization of emitted light, and decoding by passive polarized glasses. Coding is provided by a stripe-patterned anisotropic retarder film bonded on the output surface of the panel. Ideally, the patterned retarder should be placed directly in the color filter plane, but in fact the film is placed on the outer surface of the LCD substrate, i.e., at certain distance from the pixel lines. The presence of this nonzero distance causes an effect, when good stereo with minimum ghosting can be seen only within a limited viewing zone. In order to increase the viewing zone the stripes with

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Section: Introductionmentioning

confidence: 99%