We have realized a new Hi-Vision Multi-Display System which has good picture quality by using two techniques named "Digital Correction Method for Brightness Uniformity" and "Systematic ABL Method".

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A Wide-Band(150MHz) and High-Voltage(60Vp-p) Video Output Hybrid IC has been developed. It has become possible that electro magnetic interference from display is controled by this Hybrid IC. This Hybrid IC has a three-channel high frequency amplifier and a blanking function.

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We developed the horizontal deflection circuit with reduced VLF electric fields. In this circuit, the positive flyback pulse voltage and the negative flyback pulse voltage are applied to the horizontal deflection coil. Therefore, the unwanted radiation of VLF electric fields generated by the flyback pulse voltage is cancelled.

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Tension Mask Type CRT has merits for losing Doming and Raster-Moire, but has few demerits from its structure. For developing the Tension Mask, we studied Suspension System for decreasing the Beam-Misslanding caused on termal displacement and deadweight displacement.

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The FED has a very high degree of redundancy, the characteristics of high speed addressability and low power consumption. In order to develop the FED, we tried to fabricate silicon field emitter arrays(FEAs) by wet etching and measured the field emission current from them.

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Recently, a color Plasma Display has been expected as a large screen display. The panel driving margin decreases as the panel size increases. This paper proposes a new technique, superposition erase-pulse, and reports that this technique exhibits enough erasing margin comparing with a conventional narrow erase-pulse technique.

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We developed new MgO paste of T-5α in order to use thick-film-printing technology for fabricating MgO protecting layer in ac plasma displays. It is confirmed that sustaining voltage of ac plasma display with screen printed MgO protecting layer is almost the same value of that with vacuum evaporated one.

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The information about ultraviolet rays emission is especially important for full-color PDPs, because UV rays are used for excitation of phosphors. Ne+Xe gas was used for working gas and we measured about spectra emitted from the states concerned with UV rays emission of 1470A by two- and three-phase driving method.

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For the purpose of realizing the very fine barrier electrode ac plasma displays, we fabricated the test panels with 0.5mm pitch by sandblasting. As a result, it is showed that the sandblasting method has enough accuracy to fabricate the finer barrier electrode ac plasma displays.

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Paschen's curve was calculated by one-dimensional computer simulation composed of continuity equations for electrons, four types of ions, and seven excited species in He-Xe. As the concentration of Xe increases from 5% to 20%, (1) the sparking voltage becomes high, and (2) the value of (pd)_min increases, which agree qualitatively with experimental results.

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To find a cause of the life of DC-type gas-discharge panel, we investigated the difference in a thick-film and a thin-film cathodes composed of Ni and Cr. No difference in decrease of brightness was observed between two. We have concluded the metal component in thick-film can be mainly sputtered.

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The planar pulse memory PDP requires the precision alignment between the front and rear glass plates for its stable memory operation. However, the pattern distortion of the glass occurs in every firing process etc, resulting in the serious misaligment. By the improvement of the printing and firing process, the aligment error could be reduced to an allowable level.

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A new pulse memory drive scheme has been applied to a 40-in. diagonal plasma display panel. A sufficient memory margin of 8V was obtained and the stable memory operation was confirmed. The power consumption of the circuit was reduced to less than one forth of the conventional one.

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A reflective achromatic TN-cell is proposed, and the effect of Δn_s(λ) and Δn_b(λ) on the electro-optical properties of the cell is clarified, where Δn_s(λ) and Δn_b(λ) are the birefringence of liquid crystal and retardation film, respectively.

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Electro-optical characteristics of a splay-aligned (SA) twisted nematic (TN) liquid crystal display (LCD) are calculated and are compared with those of an uniform-aligned (UA) TN-LCD. The liquid crystal orientation of the SA TN-LCD for the voltage range around the threshold voltage is different from that of the UA TN-LCD and this results in different electro-optical characteristics for the SA TN-LCD especially at oblique incidences.

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A psychophysical measurement on disturbance caused by point defect on TFT/LCD was carried out. The color and the brightess of a point defect as well as background were varied. In the experiment, subjects were asked to adjust the luminance of the reference stimulus so that the amount of disturbance by both stimuli becomes the same. The results were analyzed statistically and a multi-regression model using L*, u*, v* was proposed.

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NEC has developed a 26cm-diagonal (10.4inches) TFT color LCD module, containing 1,024×768 pixels with 4,096 multicolors. A high brightness (130cd/m^2), low power consumption (15W), and compact module (16mm thickness) was achieved by newly designed TFT panel and optimized module structure.

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We have proposed a new orthogonal function for the new drive method selects many rows of STN LCD at a time. The function can narrow the distribution of column signals' magnitude and reduce the requirement to the dynamic range of column drivers.

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A new driving method for TFT-LCDs has been developed. Column inversion driving using 5V driver ICs has been possible. High quality image was achieved with a 12.1" XGA panel.

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We have investigated an application of a new high-speed and wide-band analog driver for multi-media displays. We found the driver ICs had sufficient performance for non-interlace driving of EDTV signal and twice bandwidth was required for VGA displays, compared to TV displays.

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We have proposed a new high performance polarization transforming optical system for liquid crystal(LC)-projector. The light from light source is transformed to the 45°rotated linearly polarized light by the 1/2 wave plates. This optical system is possible to realize a high effciency of light use and uniformity of chromaticity.

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The Front Projector using 3.7-in. Poly-Si TFT-LCD Light Valves with fully integrated peripheral drivers has been developed. The circuit systems are optimized for accepting various types of signal including HDTV by the line conversion technique. As a result we achieved vertical and horizontal resolution of 1000 and 750TV-lines respectively.

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A spatial light modulator using a heat resistant polymer-dispersed liquid crystal film and an a-SiGeC : H light absorber has been developed for an optically addressed projection system. Excellent performance of a high efficiency over 1.5 lm/W and 1500 lumens output has been achieved by incorporating the SLM into a Schlieren optical projection system.

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We developed total digital studio system using serial digital transmission. This system have many advantage such as high quality, labor saving, high reliability.

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NTV and NEC developed the new master system which is composed of triple "APS". This paper describes system concept and system functions feature.

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We have developed a Digital Gain Control(DGC) System for Audio Digital Master Control System. DGC has 256 memories for input source gain data. And DGC controls gain control block of Digital Fader Prosessor. Gain Control coveres ±10dB.

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We developed a new expert system which applies to Television Master Control System and realized high-operability.

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We have developed the image composing system which synthesizes a live crane camera image with a computer graphics image. Since the computer generated image is synchronized with any camera work of the crane camera, it is necessary to make a camera model in a CG space equivalent to a real camera. One of the problems is how to simulate optical behaviors of a zoom lens. In this paper, we introduce the method to obtain a position of a principal point and a focal length accurately, according to zooming and focusing degrees which are detected by attached sensors.

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The animation display system for a marathon runner which has been developed last year, is strongly improved. In this paper, how the system is improved is described. The data ratio between the measured stride and the prepared stride is reflected to the angle of each joint.

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In video synthesis, we have already proposed an extraction method which can extract an object after simple drawing of thick boundary lines at first two fields. We have developed a practical system for HDTV video based on this method that useing a new hardware for high speed with a painting equipment.

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A new 'one-point' stereo microphone has been developed. This microphone has the following two features. -1.Combination of a second order pressure gradient microphone with a line microphone realized sharp directivity in wide frequency range toward front direction. -2.Two hyper-cardioid directivities which are used toward the left and right (+-90 degree) respectively, brought good stereophonic effect.

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A digital broadcasting camera with single signal processing LSI chip has been developed. This camera uses a 0.8um process C-MOS gate arrays, and a low power 10bit A/D converter. furthermore, the digital processor of this camera enables switchable selection of an aspect ratio between 16 : 9 and 4 : 3.

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This paper describes a newly developed programming environment which transforms a video processing application written in graphic form into code sets executable on a multiprocessor system. The system consists mainly of graphic editor and integrated compiler which breaks up a signal flow graph, compensates timing differences between signal paths, and generates control panel on a screen of workstation.

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This paper describes a CNR(CNR : Chroma Noise Reducer) for MUSE decoder. This system adopts a frame recursive type NR after MUSE decoding, it is able to take effect for motion-adaptive and motion-compensation.

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Highly cost-effective 1-chop MUSE-NTSC converter LSI has been developed. It achives accurate color reconstruction, effective noise reduction, full mode display, and built-in NTSC encoding function. It utilizes 0.8μm CMOS process, custom designed DRAM, and two power supply voltages.

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An analog gamma correction IC for MUSE-NTSC Converter was developed, and the accuracy of color reproduction was improved.

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We developed a LSI for a motion adaptive 3-demensional YC separation. In this LSI, the motionpicture processor and the motion detector are improved. These improvement are introduced 2-dimensional adaptive YC sepalation filter to use a correlation of a picture. In this paper, this method of improvement is described.

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A small-sized Ghost Canceller Unit was developed by a single chip digital filter LSI. It has high performance for ghost cancellation. This paper describes the newly developed Ghost Canceller Unit.

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There are three kinds of color TV systems, NTSC, PAL and SECAM in the world, and a different TV system is used in each country and area. And so, TV and VCR in one area can receive two TV systems, especially PAL and SECAM. Therefore, they require the function to discriminate that the received TV signal is whether PAL or SECAM. Now, we have developed a new IC of PAL/SECAM signal discriminator. By using this IC, the production cost can be reduced.

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We developed IC for synchronous signal separation and holizontal PLL using CMOS process. This IC is appopriate for degital picture processing. And this technology can be easily built in digital IC.

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The authors have developed a new adaptive scan line conversion system for wide-aspect display. This system improves the problems of motion adaptive processing. In this paper, the developments of this new adaptive scan line conversion system are described.

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We have developed a digital signal processing LSI for a video camera by useing 0.8μm CMOS technology. This LSI enables us to create a very compact video camera with high picture quality.

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We have successfully developed a multimedia-use color camera which provides not only an analog video output but also a digital image such as an RGB still image with square pixel.

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We have devised new focus information called 'focus evaluation patterns' generated from several frequency band components in shooting image. We came up with new AF control method for estimating the focus position by comparing the patterns, and verified the effectiveness of our AF control method at actual shooting.

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We studied an accurate auto exposure method for video camera. It aimed at being possible to reproduce the video signal level according to refrection ratio of objects.

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We have studied a method for extracting a target object from a real time video image. By applying this new extraction method, sequential growing, on the binary image generated on normalized color differential plane, stable extraction is achieved.

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We have developed a new simulation system to evaluate today's various video compression systems. It performes fast signal processing with a parallel arrengement of 240 DSPs (Digital Signal Processors).

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