Sony Corporation

Koichiro Kakinuma

Shuichi Haga

Takehiro Nakatsue

Tatsuhiko Matsumoto

Naoya Katoh

Shigeo Kubota

Hiroshi Yamashita

Yoshiki Shirochi

Hideo Morita

Junichi Iwai

Ko Ishimoto

Yoshihiro Kosugi

Hiroshi Takizuka

Koichi Oura

Kazuji Uemura

Makoto Ando

Toshio Narushima

Masao Araya

Shinichiro Mikami

Takeo Arai

Takashi Oku

Osamu Majima

Yutaka Ota

Tohru Naganuma

Hideaki Ohmuro

Yasuhiro Tagawa

Junko Ikegami

Akira Ohryo

Masahiko Sawa

Minoru Watanabe

Tsuneo Kusunoki

Takahiro Igarashi

Tadahiko Nakamura

Tatsuya Deguchi

Naoya Kato

Masaaki Kawamata

Signals are provided which allow colors in a wider color range than predetermined standards, which can be handled by apparatus according to such predetermined standards. A primary color converter converts first color signals having primary color points in a wider color range than the primary color points according to BT.709 into second color signals based on the primary colors according to BT.709. A photoelectric transducer converts the second color signals into third color signals according to photoelectric transducer characteristics defined in a numerical range wider than a range from 0 to 1.0 of color signals corresponding to a luminance signal and color difference signals according to BT.709. A color signal converter converts the third color signals into a luminance signal and color difference signals. A corrector incorporated in the color signal converter corrects the color difference signals into color difference signals.

Signal processing apparatus and method, and program

A color liquid crystal display device assembly includes a color liquid crystal display device in which pixels each including at least a first subpixel, a second subpixel, and a third subpixel are arranged in a two-dimensional matrix, and a planar light source device which has light sources emitting first primary light corresponding to a first primary color of the light three primary colors and illuminating the color liquid crystal display device, and the liquid crystal display device has (A) second primary light emitting regions which emit second primary light when excited by the first primary light passing through the second subpixel, (B) third primary light emitting regions which emit third primary light when excited by the first primary light passing through the third subpixel, and (C) diffusion regions which diffuse the first primary light emitted from the light sources and passing through each first subpixel.

Color liquid crystal display device assembly

A color filter () used in a transmissive color liquid crystal display panel of a color liquid crystal display (LCD) apparatus. This color filter () is constituted by a tristimulus color filter for wavelength-selecting and transmitting red light, green light and blue light. Mixing of blue color and red color is prohibited by not having the transmission wavelength band of the red filter CFR overlaid substantially on the transmission wavelength band of the blue filter CFB.

Color filter and color LCD apparatus having red filter with a peak wavelength between 685 nm and 690 nm and a red light source having a peak wavelength of between 640 nm and 645 nm

Disclosed is a backlight device which is used for a color liquid crystal display and includes a light source and a backlight housing (). The light source includes a red light emitting diode (R), radiating red light, having a peak wavelength &#x3bb;pr such that 625 nm&#x2266;&#x3bb;pr&#x2266;685 nm, a green light emitting diode (G), radiating green light, having a peak wavelength &#x3bb;pg such that 505 nm&#x2266;&#x3bb;pg&#x2266;540 nm, and a blue light emitting diode (B), radiating blue light, having a peak wavelength &#x3bb;pb such that 420 nm&#x2266;&#x3bb;pb&#x2266;465 nm. The backlight housing mixes the red light, the green light and the blue light, radiated from the light source, to generate white light. A light emission intensity is adjusted so that a half value width of a spectrum of the red light, a half value width of a spectrum of the green light and a half value width of a spectrum of the blue light are such that 20 nm&#x2266;hwr&#x2266;25 nm, 30 nm&#x2266;hwg&#x2266;40 nm and 25 nm&#x2266;hwb&#x2266;30 nm, respectively.

Backlight device and color liquid crystal display

Disclosed is a color liquid display (LCD) employing a transmissive color liquid display panel. The display includes a complementary color light emitting diode, which is one of a cyan light emitting diode (C), emitting cyan light, a yellow light emitting diode, emitting yellow light, and a magenta light emitting diode, emitting magenta light, in addition to light emitting diodes emitting three prime colors, as a light source. The display also includes a complementary color filter, having at least one of a cyan filter CFC having a transmission wavelength range corresponding to the cyan light, a yellow filter CFY having a transmission wavelength range corresponding to the yellow light and a magenta filter CFM having a transmission wavelength range corresponding to the magenta light, in addition to a tristimulus color filer, as a color filter ().

Color liquid crystal display apparatus

Disclosed is a backlight device used for a color liquid crystal display (LCD) apparatus. The red light, green light and blue light, generated by a light source, made up by a red light emitting diode (R), a green light emitting diode (G) and a blue light emitting diode (B), respectively, are mixed together to generate white light. The red light has a half-value width hwr such that 15 nm&#x2266;hwr&#x2266;30 nm, and the green light has a half-value width hwg such that 25 nm&#x2266;hwg&#x2266;50 nm. The blue light has a half-value width hwb such that 15 nm&#x2266;hwb&#x2266;30 nm. The white light illuminates a transmissive color liquid crystal display panel () from its back side. The transmissive color liquid crystal display panel includes a color filter () made up by a tristimulus filter for wavelength-selecting and transmitting red light, green light and blue light.

Backlight device and color liquid crystal display apparatus

Signals are provided which allow colors in a wider color range than predetermined standards, which can be handled by apparatus according to such predetermined standards. A primary color converter converts first color signals having primary color points in a wider color range than the primary color points according to BT.709 into second color signals based on the primary colors according to BT.709. A photoelectric transducer converts the second color signals into third color signals according to photoelectric transducer characteristics defined in a numerical range wider than a range from 0 to 1.0 of color signals corresponding to a luminance signal and color difference signals according to BT. 709. A color signal converter converts the third color signals into a luminance signal and color difference signals. A corrector incorporated in the color signal converter corrects the color difference signals into color difference signals.

A printer device and a picture printing method is disclosed, in which, if the gradation for cyan is to be represented, an ink C&prime; of low concentration is superimposed to represent the low gradation area. This cyan ink is used in combination with a high-concentration blue ink B and a high-concentration green ink G to represent a high gradation area. In representing the high gradation area, the emitting proportions of the high-concentration blue ink B and the high-concentration green ink G are changed to enable the color hue in the high gradation area to be varied delicately to improve color reproducibility.

Printer and printing method

A method for controlling gradation in an ink jet printer is provided which includes the steps of (a) reading input picture data in first memory means (b) determining the position of a pixel under consideration from the input picture data read out from the first memory means and for calculating an error .di-elect cons.=X-X', where X is input picture data of the pixel under consideration and X' is a level of plural stages to be actually printed, (c) distributing the error .di-elect cons. to surrounding pixels around the pixel under consideration, (d) replacing the input picture data of the surrounding pixels, to which the error has been distributed, based on the distributed error, (e) performing the steps (a) to (d) for all input picture data by way of dithering, (f) storing the dithered pixel data resulting from the step (e) in second memory means, (g) generating, from the dithered pixel data read out from the second memory means, output picture data controlling the ink dot diameter of each pixel, (h) D/A converting the output picture data and (i) impressing an output voltage resulting from D/A conversion across an electrostriction oscillator of the printing head for variably controlling the diameter of liquid droplets of the liquid ink discharged from the printing head.

Method and apparatus for controlling gradation in ink jet printer

A printer apparatus in which a multi-nozzle print head can be produced at low cost and which can deal with changes caused with lapse of time. With the printer apparatus, effective resolution can be improved and a more accurate gradation level in picture printing can be achieved for assuring uniform printing quality. The printer apparatus has a shading correction unit 14 for correcting the picture printing data signal for printing using shading correction data previously found and stored in the EE-PROM 10 and shading correction data entered from a man/machine interfacing unit 2 and for generating a head impression signal for driving a print head 16 based on the corrected picture printing data.

Printer apparatus

Growing community of inventors

Tokyo, Japan

Koichiro Kakinuma