LCOS projection technology emerging

LCoS technology characteristics and development
Abstract
LCoS is a new generation of TFT-LCD liquid crystal display products. Expected to 2005, LCoS rear projection TVs in about 20% market share. This treatise describes the technical characteristics, key technologies, applications and prospects.
LCoS belong in new generation LCD creation of TFT-LCD.LCoS be possessed of almost 20% mart share in rear projection television, prefigured to 2005 annual. Its technology specifics, key technology, application domain and development foreground introduced in this paper.
1. Introduction
LCoS (Liquid Crystal aboard Silicon, LCoS) is a liquid crystal display (LCD) of the emerging technologies, is by Aurora Systems integration of semiconductor technology, CMOS integrated circuits and fluid crystal 2 avails, in 2000, amplified a high-resolution, low-price reflective of new display technology. It is a system ashore the LCD directly to the new silicon-chip liquid crystal display devices. Silicon chip can be active-matrix thin-film transistor LCD (AMTFT), the external pedal and control circuitry, and all additional systems on altitude of the LCD as a substrate, and the other an for a common electrode coated with a transparent conductive layer coupler sealing glass substrate into a thin box, into the liquid crystal display device can be made of Liquid Crystal on Silicon (LCoS).
we all know, LCD has worked through the TN type, STN-type and TFT-type and several generations of updates, they are hard on the LCD itself. And the new sucked LCD and LCoS IC (IC) made of one, which is LCD, not doubt, is a new scientific breakthrough, it is a new generation of TFT-LCD liquid crystal display products.
2.LCoS
LCoS technical characteristics of the building in the manufacturing of semiconductor silicon driving plate (also known as CMOS-LCD), and then grinding by grinding on a silicon chip flat and coated aluminum (Al) as a mirror, forming a CMOS substrate, then the CMOS substrate and coated with a transparent electrode on glass substrate adhesion, and into the LCD, the archives. LCoS determine its structural characteristics with the conventional LCD has a great number of different points, with some LCD monitors and anyone other technical traits that can no be likened.
2.1 Intelligent
as LCoS display device is a form of the liquid crystal display (LCD) and large scale integrated circuit (LSIC) made one of the display device,PULSERA AZUL CON BANDERA, and even the set of information processing system as a whole, so the display device itself has some beautiful features, which can be phoned intelligent display devices. Intelligent display and performance combined the most advanced chips, not only can knob extremely intricate measurements, but also has a PC similar functions. Not the PC is value a PC, it will no longer be intelligent display computer peripherals and gradually rose to fashion devices, and computers on one equal footing.
LCD and LSIC are dual brothers. LCD's light, thin, small, mini (that is power) is represented by the display device, a display of private information, and personalized end outcome for the LSIC provides a spacious market prospects. The 1970s to the ascend of private computers as a symbol, LCD and LSIC subserve each other, fast development, and gradually formed the world's largest manufacture. 90 years, LCD has once again combined with the LSIC, to achieve a portable microcomputer (PC) for quick development.
LCD and LSIC the twins are interdependent and are equal improvement. LCD left the LSIC, the light, thin,PULSERA TRANSPARENTE CON BANDERA, small, micro-features can not be achieved, whether the LSIC can not be large and wealthy, and timely processing of information and effortless to use LCD timely and accurately presented to the people's vision, merely also greatly buried its representation. They must be combined into one can only play a full character. Unfortunately, a long time they are two different products.
LCoS will eventually join them into a production of, LSIC the LCD to addition the comprehension feature, LCD so LSIC's intelligence extra directly presented to the people's vision.
2.2 external wire less connection is uncomplicated and easy

whole convergence a large number of ordinary LCD intensive external leads, such as a 1024 × 768 pixel phalanx of the LCD will There are 2592 external leads,PULSERA BLANCA CON MEXICO, the whole assembly to a lot of inconvenience, as is the LCD and LCoS system on the silicon chip, LCD row, column pinout are within the layer through the semiconductor process connected with the IC, so only a few remain in the external control of data lines, timing lines and power lines. Can use common ports and front-end circuit joined quite easily.
2.3 smaller, more crowded appearance and cheaper LCD
common absence in the manufacturing process lithography on a glass substrate, made of pixels. Typically the pixel system to 0.28mm is not easy, because each pixel on the need to control out of an spirited device. However, pixels of LCoS chip system in silicon, silicon process using LSIC processing, the system can be like favor to 4μm or less. Therefore, only a few inches of silicon 零点 can be made on 1024 × 768 pixels, or 1920 × 1240 pixel density matrix display products. Density increases the quantity of information displayed, when the volume is reduced (up to 0.35 to 0.5 inches),PULSERA TRANSPARENTE CON LOGO XB, the cost of normal substances and will be greatly dwindled. LCoS driver IC can be entirely external circuits, such system in the CMOS substrate, reducing the number of external IC and package costs and the volume reduce. Trial production of LCoS display the current cost of only $ 50. 2.2/1280 × 1024 pixel matrix of the LCoS chip amount was $ 150, compared with the same resolution LCD and digital micromirror (DMD) is many lower in the hereafter there will be more cut.
2.4 pixel beginning rate, high resolution

LCoS solution to a common TFT-LCD pixel aperture ratio is not high technical problems. Pixel aperture ratio refers to the display pixels on the proportion of the efficient display area size. TFT-LCD to be common in the area of ​​each pixel within the region to draw a field-effect transistors and capacitors are made, as is common in the TFT-LCD on glass substrate made of amorphous silicon film, amorphous silicon or polysilicon layer produced on the FET, deserving to the electron mobility of amorphous silicon or polycrystalline silicon is low, so the FET active devices such as the share of the larger, and LCoS uses silicon, the electron mobility than amorphous silicon or polysilicon is much higher, so the area can be made very small, so its opening rate is high, approaching 96%.
Because of LCoS transistors and driver circuits on silicon substrates are within the system,PULSERA BLANCA CON ITALIA, situated under the reflector, the surface area is not occupied, it is only the pixels occupied by open space area was not as transmissive TFT LCD, and the wire are occupied by the open area, so in theory both the aperture percentage alternatively resolution, LCoS are higher than the transmissive LCD. Since LCoS uses to control the resolution of the semiconductor, so the resolution is lofty, normally to SXGA level (1280 × 1024 pixels), high-resolution images has led to smaller pixels, so picture the real thing. High resolution can be achieved with the semiconductor manufacturing process is hasty and fine, easy-to improve the resolution, principally as portable equipment advice. So far, it's manufacturing process technology has matured.
2.5 high utilization
LCoS light can improve the utilization of light. It is alike to the LCD projection exhibit, the main inconsistency is that LCoS is a reflective imaging, so the light efficiency of up to 40%, and digital light processing (DLP) preferably, the transmissive LCD is merely 3 apt 10% merely. As we entire understand, LCD monitors are passive components, * the external ambient light to achieve modulation exhibit, the LCD in common with a polarizing movie before and afterward, LCD is the * modulation polarized light switch-off to achieve the display. Polarizing film is * preoccupied light to generate polarized light, and therefore made the LCD light transmission rate is quite cheap, the average transmittance TFT-LCD was only a few percent,Balance Xtreme, therefore, to show clearly, back the TFT-LCD be fitted with a mighty backlight. The backlight is very power, thus power expense of TFT-LCD micro-features to make the detriment of Yi.
LCoS back substrate using silicon substrate, it is mostly made of reflective LCoS. Coated with silicon pixel and the optical reflective film, can be full of light reflecting, which have encountered maximum of the incident light to be accustom. LCoS reflective imaging optical efficiency, saving not only encounter environmental conservation requirements, but also for portable IT products to provide high-definition large-screen surface. Such as mobile phones, handheld computers (PDA) and other portable products online is a major obstacle to the shade is also small, the resolution is not high, the use of a device structure of myopia can solve this problem.
TFT-LCD using mediocre transmission type projection TVs made with made with a reflective LCoS projection TVs, compared with a reflective LCoS projection TV made only 1 / 5-power light source can be obtained mediocre transmissive TFT-LCD projection television several periods brighter display. A 400W light behind via the reflective LCoS type 74 inches high-definition television (HDTV), CRT sunlight than the brightness. This is the other projection TVs can not achieve.