logy for high picture quality

Vertically Aligned Liquid Crystal system

In every type of projector system, displaying absolute black is a major issue in order to achieve a high contrast ratio. In other words, the contrast ratio of a projector depends on how effectively the light from the source can be blocked so it does not leak through the LCD device.

All Liquid Crystal Display (LCD) devices control the amount of light to be projected by applying an electric field to the liquid crystal gap. In typical LCD devices, black is produced when electric field is applied across the liquid crystal cell gap. However molecules near the surface of the glass substrate may not be accurately controlled due to the influence of the alignment film. This is not an issue for bright images. However, when displaying dark black images, light can tend to leak from the LCD device, since the molecules near the surface are less accurately controlled, resulting in a creamy black color.

The SXRD device does not exhibit these characteristics. This is because the Vertically Aligned Liquid Crystal system displays black when an electric field is not applied and because all molecules are in the correct alignment to block light. The direct result is a far deeper black level, leading to a high contrast ratio.

Thin liquid crystal cell gap

Another important factor enabling the high contrast of the SXRD device is its ultra thin cell gap of less than

2 micrometers. With conventional Vertically Aligned Liquid Crystal systems, a thin cell gap could not be achieved. Sony has overcome this difficulty through the use of innovative planarization technology in the silicon backplane structure and an advanced Silicon wafer-based assembly process.

The SXRD device also adopts a structure that does not use "spacers" - columns found in conventional reflective liquid crystal devices to maintain a constant gap between the liquid cell floor and the top of the device. Spacers tend to both scatter and reflect light, which can impair high contrast pictures. In the spacerless SXRD device, these artifacts are no longer seen.

Short response time

The thin cell gap structure in SXRD devices also contributes to an ultra-short response time of 5 milliseconds. The SXRD device reacts promptly to the instantaneous change of colors, enabling the projector to display a smooth motion.

Consequently, the SRX-R110 and SRX-R105 are free from motion blur – a particularly significant benefit for visuals that include fast-moving objects.

Reliable imaging device

The SRX-R110 and the SRX-R105 use high-power bright lamps. As a result special attention has been paid to the reliability of the SXRD device. The inorganic materials utilized for the alignment layer of the SXRD device are resistant to deterioration or deformities that could occur due to the intense heat and light generated by the powerful projector lamp.

SXRD Cross-Section view

Light

Glass Substrate

Vertically Aligned Liquid Crystal

Silicon Backplane

High-Density Pixel Pitch 8.5 µm

• 4 x Full-HDTV (4096 H x 2160 V pixels)

Thin Cell Gap (2.0 µm) Space-less

• Short response time < 5 msec

• High Device Contrast ratio 4000 : 1

Inorganic

Alignment Layer

• High reliability

Aluminium Pad

Narrow Inter-Pixel

Spacing (0.35 µm)

• High fill factor 92 %

• High reflectivity

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