Sony Corporation

Asahi Kogaku Kogyo Kabushiki Kaisha

Asahi Kogaku Kogyo K.k.

Takehiro Nakatsue

Tatsuhiko Matsumoto

Shuichi Haga

Koichiro Kakinuma

Shigeo Kubota

Naoya Katoh

Hiroshi Yamashita

Yoshiki Shirochi

Hideo Morita

Ko Ishimoto

Junichi Iwai

Yoshihiro Kosugi

Hiroshi Takizuka

Koichi Oura

Kazuji Uemura

Takeo Arai

Takashi Oku

Yutaka Ota

Yasuhiro Tagawa

Toshiya Hamada

Shinobu Hattori

Tsuneo Kusunoki

Takahiro Igarashi

Yoshihide Shimpuku

Akira Morimoto

Hiroaki Eto

Yutaka Imai

Takumi Tsuru

Kenichi Kanai

Taizo Saito

Tomizo Shiraishi

An image processing apparatus and an image processing method to preferably transmit/receive or display high dynamic range images. In an image transmission system implementation, metadata is transmitted, the metadata storing information such as peak luminance, color gamut and optical-electro transfer or other characteristics of high dynamic range (HDR) content. An image receiving apparatus utilizes the metadata to perform dynamic range conversion using the metadata to adapt its display to display the HDR content.

Apparatus and method for transmitting and receiving high dynamic range images

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

Disclosed herein is an image signal processor for carrying out conversion into an xvYCC signal by using a photograph film as a material, the image signal processor including: acquisition means for acquiring print film concentration data based on said photograph film; generation means for generating spectral data on an image on a screen previously presumed based on spectral concentration characteristics of colors of a positive film having an image projected on said screen, a spectral distribution of a projection light source, and the print film concentration data; arithmetical operation means for arithmetically operating an XYZ tri-stimulus value corresponding to the spectral data; and conversion means for converting the XYZ tri-stimulus value into the xvYCC signal.

Image signal processor, image signal processing method for use in the same, and program

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 color liquid crystal display device capable of displaying a large color gamut is provided. A color liquid crystal display deviceincludes: a transmissive color liquid crystal panelhaving a color filter and a backlight light source, in which the backlight light sourceincludes a fluorescent lampof large color reproduction range, a color filteris made of color filters of three primary colors that select the wavelength to transmit red light, green light and blue light, and the filter of each color has a spectroscopic characteristic suitable for the spectrum of the fluorescent lampof large color reproduction range.

Color liquid crystal display device

A method for measuring an anamorphic lens includes a first step of converging a light beam emitted by a light source towards a reference standard and adjusting the reference standard along the travel direction of the light beam so that the light beam reflected by the reference standard forms a point spread function image or a line spread function image on a focal plane. A second step of replacing the reference standard with an anamorphic lends to be measured and adjusting the same so that the light beam reflected by the anamorphic lens forms a line spread function image on the focal plane, and a third step of measuring the anamorphic by comparing the first step with the second step are provided.

Method and apparatus for measuring a lens

An apparatus for adjusting light beam direction comprises, for instance, two prisms, i.e., a first and a second prisms arranged, in order, along an incident direction of light beam; an incident face of the first prism being parallel to a plane which is assumed to rotate an imaginary vertical plane perpendicular to the incident direction around a rotational axis by a first acute angle; an outgoing face of the first prism being parallel to a plane which is assumed to rotate the vertical plane around the axis by a second acute angle larger than the first one in the same direction as the latter; an incident face of the second prism being parallel to the outgoing face of the first prism and an outgoing face of the second prism being parallel to the incident face of the first prism, at the zero-adjusting state; and at least one of these prisms being able to adjustably rotate around the rotational axis. The apparatus may be incorporated into a scanning optical apparatus and makes it possible to make the incident and outgoing light beams parallel to one another and to restrict, to a low level or even to zero, the shift therebetween.

Apparatus for adjusting light beam direction

Growing community of inventors

Kanagawa, Japan

Takehiro Nakatsue