Fujitsu General Limited

Tokyo Ohka Kogyo Co., Ltd.

Sony Corporation

Photopoly Ohka Co., Ltd.

Junichi Onodera

Masamichi Nakajima

Masayuki Kobayashi

Seiji Matsunaga

Hayato Denda

Asao Kosakai

Toru Aida

Kouji Harada

Shigeru Ohtawa

Shinichi Morishima

Masakazu Murata

Kazuo Kamiyama

Makoto Tabuchi

Toru Eto

Shigeru Otawa

Hiroshi Komano

Masaru Shida

Kiyoshi Uchikawa

Makoto Ikeda

Hiroyuki Tohda

Masayuki Bannai

Hideyuki Ohmori

Masakazu Fukuchi

Nobuyuki Takagi

Takashi Kamimura

Takehito Hiyoshi

Shuji Kiyama

The object of the present invention is to provide a color correction process designed for enabling all the hues in the image properly corrected without leaving any uncorrected range; the inputted image data represented by the combination of 3 color signals is divided into a plurality of ranges by the hue so that color correction can be made by the range of each hue; in the color correction processing circuit by each hue, in order for the peripheral area of the range set for color correction to be prevented from being left uncorrected, the color correction process is designed so that correction ranges peripherally overlap with one another.

Color correction processing circuit by each hue

To provide a projector having a configuration for reflecting correction by lens shift on keystone correction and preferentially using a lens shift function. The projector includes a keystone correcting portion for applying keystone correction to an input image signal, a display device for displaying an image in accordance with an output signal of the keystone correcting portion, a projection lens for projecting the image displayed on the display device to a screen, a lens driving portion for moving the projection lens and outputting the position information on the projection lens, and a control portion for outputting parameters used for keystone correction and the position information on the lens, in which the control portion determines whether the moving distance of the lens reaches a limit value, receives a keystone adjusting signal for changing the parameters used for keystone correction and receives a keystone adjusting signal for changing parameters used for keystone correction and outputs the signal only when the moving distance reaches the limit value.

Projector

A contour emphasizing circuit which comprises a contour pick-up unitfor picking up a contour component HE from an input luminance signal Y, a level judging unitfor judging the luminance level of the input luminance signal Y, a coefficient control unitfor changing the coefficient in a plurality of steps depending upon a judgment signal and multiplying the contour component HE by the coefficient to output the product, and an adderfor adding the contour component outputted from the coefficient control unitto the input luminance signal Y to output an emphasized-contour luminance signal. The coefficient to be multiplied by the contour component HE is changed in a plurality of steps depending upon the luminance level of the input luminance signal Y, and the contour component HE to be added to the input luminance signal Y is controlled to have a magnitude appropriate to the luminance level of the input luminance signal Y. As a result, the contour is emphasized according to the luminance level of the input luminance signal Y without causing excessive contour emphasis by adding a large contour component to a dark image of a small luminance level, thus preventing formation of unnatural images.

Contour emphasizing circuit

A scanning conversion circuit which interpolates an image signal of an interpolation scanning line from an input image signal Vi of a scanning line adjacent to the upside or downside of an interpolation scanning line to output an image signal Vp doubled in scanning line, and which comprises a directivity detection unit () for detecting, in order to prevent an unnatural view of a slant line when a moving image is displayed with an image signal Vp, a direction having the strongest correlation out of a plurality of directions, including a vertical direction and a slant direction, centering on an interpolation point of an interpolation scanning line based on the signal Vi, and an average value computing unit () for computing an average value of image signals at two sampling points corresponding to the detected direction out of a plurality of sampling points in an upside scanning line and downside scanning line. When the directivity detection unit () judges that a slant-direction correlation is the strongest, the average value computing unit () computes an average value of image signals at corresponding and slant-direction two sampling points in an upside scanning line and downside scanning line to process the value as an image signal of an interpolation scanning line, thereby permitting a proper interpolation processing an a slant line in a moving image.

Scanning conversion circuit

A support for receiving an HDD main body installed in an apparatus main body of an AV server. An HDD unit formed by attaching, to peripheries of the HDD main body, a frame having at least a gripping portion and a latch. The support has a plurality of slots which are formed vertically at opposing positions inside of both sides in a parallel state at regular intervals, and a latching portion at an upper edge in a lateral direction. Vents are provided between the slots, and a guide member having a groove portion is disposed in each slot. The HDD unit is inserted into a slot with the frame being guided into the groove portion of the guide member. The latch of the frame is engaged with a latching portion of the support so that each HDD unit is locked independently.

Data recording and reproducing apparatus including supporting means

A data recording and/or reproducing apparatus having actuating buttons or adjustment volumes which enable a wide variety of processing operations despite a limited operating space, and which is able to display levels of plural audio data or to display various other data on a limited display area without detracting from viewability. To this end, the apparatus recording and/or reproducing includes a unit for recording and/or reproducing data for a non-linear accessible recording medium, at least one input port and at least one output port. The input port and the output port time-divisionally access the recording and/or reproducing unit to process the data inputted to the input port to output the processed data to the recording and/or reproducing a unit. The data reproduced from the recording and/or reproducing unit is processed by and outputted from the output port. The apparatus also includes a port actuation button for selecting the input and output ports, an actuation selection button for selecting recording or playback for the input port or the output port as selected by the port actuation button, and a controller for performing control so that the recording operation or the playback operation as selected by the actuation selection button will be executed by the input port or the output port as selected by the port actuation button.

Recording and/or reproducing apparatus for detecting and displaying audio signal levels of input and output and ports

A data recording and/or reproducing apparatus includes a unit for recording and/or reproducing data for a non-linear accessible recording medium, at least one input port and at least one output port. The input port and the output port time-divisionally access the recording and/or reproducing unit to process the data inputted to the input port to output the processed data to the recording and/or reproducing a unit. The data reproduced from the recording and/or reproducing unit is processed by and outputted from the output port. The apparatus also includes a port actuation button for selecting the input and output ports, an actuation selection button for selecting recording or playback for the input port or the output port as selected by the port actuation button, and a controller for performing control so that the recording operation or the playback operation as selected by the actuation selection button will be executed by the input port or the output port as selected by the port actuation button.

DATA RECORDING AND/OR REPRODUCING APPARATUS, ADJUSTMENT VOLUME IN DATA RECORDING AND/OR REPRODUCING APPARATUS, PORT OPERATING METHOD IN DATA RECORDING AND/OR REPRODUCING APPARATUS AND SELECTIVE INDICATING METHOD FOR ADJUSTMENT VOLUME IN DATA RECORDING AND/OR REPRODUCING

An image processor containing an EPROM ( ) stored with coefficient data for image enlargement and reduction, coefficient read controllers ( ) for reading out coefficient data from the EPROM ( ) according to an enlargement/reduction selection signal, a variable horizontal characteristic filter ( ) for executing either image enlargement or image reduction according to the coefficient data, a variable vertical characteristic filter ( ) also for executing either image enlargement or image reduction according to the coefficient data, a frame memory ( ), a contour correcting circuit ( ), and selectors ( ). When image enlargement is selected by selectors ( ), input video signals are processed by the contour correcting circuit ( ), the frame memory ( ), and the filters ( ) in this order while, when image reduction is selected, input video signals are processed by the same in the reverse order. The portion which should not undergo contour enhancement does not undergo contour enhancement during image enlargement, and high frequency components enhanced by contour correction during image reduction do not disappear and adequate contour correction, even when either processing image enlargement or reduction, is selected.

Image processor

A dual-loop PLL circuit is provided with a clamping circuit an A/D conversion circuit a reference color burst outputting circuit a PLL circuit and phase detecting circuit The phase of a reference color burst KK outputted from the circuit is changed at a slice level SL, and the level SL is changed by a reference phase value in the phase detecting circuit The sampling clocks outputted from the PLL circuit to the A/D conversion circuit are converted to a signal of a frequency of 4 Fsc, and the phase of the signal can be changed continuously by using the reference phase value. In addition, since the phase of the sampling clocks can be adjusted to a desired value and the output signal of the A/D conversion circuit can be converted onto a prescribed color difference signal by a signal conversion circuit and outputted, the color difference signals can be demodulated easily with high accuracy.

Dual-loop PLL circuit and chrominance demodulation circuit

In a subfield drive method, two subframes of the least brightness are arranged adjacently to each other to select and light up the display device in terms of the change in image brightness in the time axial direction. When, for example, the level of original signal changes from 7 to 8 or from 8 to 7, SF , SF , SF and SF are selected as subframes for level 8, and SF , F and SF are selected as subframes for level 7. This prohibiting any continuous lighting or non-lighting at the levels 7 and 8, there is no substantial change in brightness nor degradation of picture quality at that time. Any distortion of moving image (pseudo contour) is removed by the correction circuit having the frame memory that delays by one frame, the correction constant set circuit that outputs correction data, and the adder that adds the correction data to the original image signal.

Drive method and drive circuit of display device

In an error diffusion processing unit to get a false half tone diffusing in the surroundings the luminance error between the original picture element signal quantizedly input and the preceding data, one dot of said signal is converted into plural picture elements. The respective picture elements (pixels) thus converted are compared with the prior data to detect the luminance error, which will then be weighted by multiplying it with certain coefficient to give, for instance, the reproduced error in one line past, that in one dot past and further the reproduced error a in one-line and one-dot past, which will respectively be added to the original pixels. Producing a false tone by error variance in unit of pixel enables to display the half tone without expanding the half tone display area beyond required dot number.

Drive for a display device

In a display device in which each group of plural drive elements takes charge of the drive of plural picture elements (pixels) and the display luminance changes as the number of sustaining pulses changes that are supplied to a plasma display panel, a constant emission luminance characteristic is maintained by increasing the number of sustaining pulses for a larger load when the display load factor is large, and decreasing the number of sustaining pulses for a smaller load when the display load factor is small. When displaying a multi-tone image by a subfield drive method, a display area detect circuit allows the display of an image with constant luminance characteristic despite the variation of the display load factor, and prevents the deterioration of tone characteristic due to the subfield drive method, and further, a half tone display circuit allows the decrease of the bit number thereby simplifying the configuration of the display area detect circuit.

Drive circuit for display device

A photopolymerizable composition composed principally of an acrylic linear copolymer, an ethylenically-unsaturated compound and a photoinitiator and adapted to fabricate printed circuit boards. The ethylenically-unsaturated compound contains a specific acrylic ester. The photopolymerizable composition can be developed with an aqueous mild alkaline solution.

Photopolymerizable compositions

A photosensitive resin composition for forming light shielding films comprising a mixture of; 10 to 60 parts by weight of a high molecular weight polymeric binder; 15 to 50 parts by weight of a photopolymerizable monomer; 0.1 to 30 parts by weight of a photopolymerization initiator; and at least 20 parts by weight of a light shielding pigment comprising carbon black coated with resin for forming black matrices such as CRT displays and liquid crystal panels; a black matrix made from by said photosensitive resin composition; and a method for producing said black matrix comprising the steps of coating said photosensitive resin composition comprising a high molecular weight polymeric binder, a photopolymerizable monomer, a photopolymerization initiator, and a light shielding pigment consisting of carbon black coated with resin on a substrate, selectively radiating an activated beam, and developing the coating using an alkaline aqueous solution to form a pattern. The blackmatrix maintains high image contrast, and excels in electric insulation.

Photosensitive resin composition for forming light shielding films,

Coupled to an error variance circuit 11 is an emission luminance characteristic acquisition circuit 20 that counts up, at a display number counter 21, the display number in the single or plural frames of the respective bits of image data by the counters, M in number, corresponding to said bits, then solves for display area percentage (Sk) dividing, at a display area percentage operation part 22, the display dot number as counted at a display number counter 21, by total dot number, and acquires the luminance deviation characteristic for each bit by means of an emission luminance deviation characteristic measuring part 24. The luminance deviation thus obtained is renewed for each frame and transferred to the error variance circuit 11, and processed for error variance on the basis of the emission luminance characteristic to be output at PDP. At low level, on the other hand, the luminance deviation is rendered either fixed type luminance deviation or emission luminance level more or less higher than the actual one to reduce the diffusion noise particularly at the low level image portion thereby obtaining a more natural image.

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Kanagawa, Japan

Junichi Onodera