Sony Corporation

Takashi Oku

Takeo Arai

Masato Hatanaka

Kazuhiro Yokota

Yutaka Ota

Yasuhiro Tagawa

Shingo Ohkawa

Koichiro Kakinuma

Shuichi Haga

Takehiro Nakatsue

Tatsuhiko Matsumoto

Kenichi Nakaki

Tetsuo Shibanuma

Haruaki Wada

Shinsuke Kito

Yuichiro Maruyama

Sinobu Yamada

Kouji Iida

Seiji Miyamura

Kenichi Takahashi

Akio Machida

Nobuhiro Suzuki

Katsuyuki Akutsu

Takuji Yoshida

Kazuhito Shimoda

Junichi Ohsako

Sho Sakamoto

Naoto Kobayashi

Tomohisa Uba

Akira Koshimura

Yoshinari Kawashima

Kazuhiro Shiratori

To provide a display device in which the brightness of the image viewed by the observer is bright, and the brightness of the image is as uniform as possible. The display device according to the present invention includes a frameand an image display device, the image display deviceincludes an image forming apparatusand an optical device, the optical deviceincludes a light guide plate, a first deflection unitconfigured with a first hologram diffraction gratingand a second hologram diffraction grating, and a second deflection unitconfigured with a third hologram diffraction grating, and slant angles and pitches of the first hologram diffraction grating, the second hologram diffraction grating, and the third hologram diffraction gratingsatisfy a predetermined relation.

Optical device and display device

A stereoscopic display device includes: a display panel having a display screen on which two-dimensional image is displayed, and configured to polarize image light of the image-displaying into a particular polarization direction; and a lens array element disposed to oppose the display screen of the display panel, and having a liquid crystal layer which includes liquid crystal molecules having a refractive index anisotropy and aligned in a predetermined orientation direction under no application of voltage. The lens array element is configured to electrically change the alignment of the liquid crystal molecules to generate a lens effect, and configured to selectively change a state of passing therethrough of the image light exiting from the display panel. The predetermined orientation direction of the liquid crystal molecules of the lens array element and the polarization direction of the image light are parallel to each other.

Stereoscopic display device

Disclosed herein is a light emitting device, including: a light emitting diode; an sealing resin member having an arrangement face and configured to seal the light emitting diode; and a lens disposed on the arrangement face of the sealing resin member and formed so as to have a circular shape as viewed in the direction of an optical axis of light emitted from the light emitting diode, the lens having a concave portion formed at a central portion in such a manner as to be concave toward the sealing resin member.

Light emitting device, area light source apparatus and image display apparatus

A light emitting device includes a plurality of light emitting diodes, a plurality of sealing resins, and a lens body formed in substantially a shape of a flat plate for guiding the light. The lens body is also disposed in a state of extending over the disposition surface of each sealing resin. The lens body includes a plurality of lens parts and a plurality of light guiding parts for reflecting the light by inside surfaces of the light guiding parts. The plurality of lens parts and the plurality of light guiding parts of the lens body are formed integrally with each other. The lens parts are disposed on the respective disposition surfaces of the sealing resins, and a plurality of light emitting function parts for sending out the light reflected by the inside surfaces of the light guiding parts are formed in the light guiding parts.

Light emitting device, surface light source device, and image display device

A light source apparatus used in a backlight apparatus is disclosed. The light source apparatus includes a light-emitting diode unit and a wiring board. The light-emitting diode unit is provided as one unit by nonlinearly and closely placing respective light-emitting diodes of red, green, and blue colors, at least the light-emitting diode of one color out of the light-emitting diodes of the respective colors being constituted by first and second light-emitting diodes having different chromaticities such that an average chromaticity of the first and second light-emitting diodes is a predetermined chromaticity. On the wiring board, a plurality of light-emitting diode units are arranged at predetermined intervals in a predetermined direction.

Light source apparatus, backlight apparatus, liquid crystal display apparatus, and manufacturing method of backlight apparatus

Disclosed is a backlight device for illuminating a transmissive color liquid crystal display panel from its backside with white light. The backlight device includes, as a light source, a plural number of principal light emitting diode units, and a plural number of subsidiary light emitting diode units, where m and n are natural numbers. Each principal light emitting diode unit is made up by a plural number of light emitting diodes () arrayed in a string and emits white light of preset chromaticity. Each subsidiary light emitting diode unit is made up by a plural number of light emitting diodes () arrayed in a string and emits white light of chromaticity in the vicinity of the preset chromaticity. The number of the subsidiary light emitting diode units is smaller than that of the principal light emitting diode units. When the principal light emitting diode units and the subsidiary light emitting diode units are arrayed in a two-dimensional matrix, the subsidiary light emitting diode unitsare arrayed without being juxtaposed on the same row, and the subsidiary light emitting diode units, arrayed in a center column of the two-dimensional matrix, are arrayed towards the center of a color liquid crystal display panel ().

Backlight device

An illumination device including a first light source for emitting light of a first primary color, a second light source for emitting light of a second primary color, and a third light source for emitting light of a third primary color, wherein the first light source is a light emitting diode, the second light source is a fluorescent tube, and the third light source is either a light emitting diode or a fluorescent tube. The illumination device generates white light by mixing the light emitted by the first, second and third light sources. A liquid crystal panel is illuminated with the white light generated by the illumination device.

Illuminating device with primary color LED and fluorescent light sources, and liquid crystal display device

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 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

The present invention relates to a backlight apparatus and a liquid crystal display apparatus, capable of realizing a backlight apparatus having high color reproductivity without color irregularities in a backlight apparatus having a LED device as its light source. In the optical unitthere are disposed the dichroic mirror B which transmits green light Lg and red light Lr and reflects blue light Lb, the dichroic mirror G which transmits the light Lb and the light Lr and reflects the light Lg, and the dichroic mirror R which transmits the light Lb and the light Lg and reflects the light Lr, and they transmit or reflect the light emitted from the LED devices 11B, 11G and 11R to mix to form the white light Lw. The light Lw formed by the dichroic mirrors B, G and R is entered to the light guiding plateby the mirror performing a total reflection. Therefore, in the backlight apparatus having an LED device as its light source, it is possible to realize a backlight apparatus having high color reproductivity, without color irregularities.

Backlight apparatus, liquid crystal display

The present invention is directed to a backlight device using light emitting units () in which a large number of light emitting diodes () are mounted, which comprises a reflection plate () for reflecting rays of light which have been emitted from a light emitting unit (), wherein the reflection plate () is composed of a bottom surface reflection plate () for reflecting rays of light emitted from the light emitting units () from the bottom surface direction, side surface reflection plates () to () for reflecting rays of light emitted from the light emitting units () from respective forward and backward, and left and right side surface directions, and corner reflection plates () to () in which the bottom surface reflection plate () and the side surface reflection plates () to () are connected to cover the respective corner portions, and serves to permit rays of light incident onto a display panel () to be uniform to realize uniformity of brightness of the entire surface thereof.

The present invention relates to a backlight apparatus and a liquid crystal display apparatus, capable of realizing a backlight apparatus having high color reproductivity without color irregularities in a backlight apparatus having a LED device as its light source. In the optical unit, there are disposed the dichroic mirror B which transmits green light Lg and red light Lr and reflects blue light Lb, the dichroic mirror G which transmits the light Lb and the light Lr and reflects the light Lg, and the dichroic mirror R which transmits the light Lb and the light Lg and reflects the light Lr, and they transmit or reflect the light emitted from the LED devicesB,G andR to mix to form the white light Lw. The light Lw formed by the dichroic mirrors B, G and R is entered to the light guiding plateby the mirror performing a total reflection. Therefore, in the backlight apparatus having an LED device as its light source, it is possible to realize a backlight apparatus having high color reproductivity, without color irregularities.

LCD with multi-color optical unit and cross dichroic device

A light dimming dot pattern is provided for an LCD in which the diameter of dots is changed in a range from approximately 0.16 mm to approximately 0.65 mm depending on the distance of the dots from a fluorescent tube () in such a manner that the volume of the shielded light is increased and decreased at a location close to a position overlying the fluorescent tube () and at a location remote from the fluorescent tube (), respectively. In this manner, a light dimming dot pattern with a transmittance for all light rays of approximately 62% (roughly in the vicinity of 62%), higher than the transmittance for all light rays in the conventional technique not higher than 50%, is produced. Consequently, the light of uniform high luminance may be produced without raising the luminance of the fluorescent tube (), and hence an LCD of high luminance may be realized.

Backlight device and liquid crystal display apparatus

Backlight device and liquid crystal display

Provided are a reflective liquid crystal display and a light guide plate capable of eliminating a decline in virtual contrast properties of a display screen in a reflective liquid crystal display comprising a light guide plate with a prism unit so as to display an excellent image. An antireflective film ( ) is formed on a planar surface of a light guide plate ( ) which is disposed so as to face a viewing side of a liquid crystal display panel ( ). The antireflective film ( ) inhibits light reflection on the planar surface of the light guide plate ( ). Moreover, an adhesive layer ( ) is provided to improve the adhesion of the antireflective film ( ) to the planar surface of the light guide plate ( ).

Growing community of inventors

Saitama, Japan

Takashi Oku