Seiko Epson Corporation

138 East Lcd Advancements Limited

Seiki Epson Corporation

El Technology Fusion Godo Kaisha

Osamu Yokoyama

Satoru Miyashita

Tatsuya Shimoda

Masatoshi Yonekubo

Hidekazu Kobayashi

Tatsuaki Funamoto

Takashi Takeda

Mitsutaka Ide

Yojiro Matsueda

Takeshi Koshihara

Daisuke Ishida

Toshiharu Katada

Akira Komatsu

Masaya Ishida

Katsuyuki Morii

Takeo Kaneko

Masahiro Furusawa

Masahiro Uchida

Fumika Yamada

Hidefumi Sakata

Satoshi Nebashi

Kazutoshi Kato

Hideaki Iwano

Hayato Matsuki

Hiroshi Kamakura

Hidemitsu Sorimachi

Goro Hamagishi

Yasunori Taga

Osamu Wada

Shohei Yoshida

Shoichi Uchiyama

Fumio Koyama

Atsushi Saito

Kunihiko Yano

Toshihide Shinohara

Toshiyuki Noguchi

Mitsuro Atobe

Taku Aoyama

Shizuo Tokito

Koji Noda

Toshio Arimura

Hiroaki Nomura

Kanemitsu Kubota

Shigeru Kogure

Yuji Fujimori

Yoshinori Awanohara

Tetsuya Seki

Akira Komatu

An optical element includes a substrate and a first hologram element provided on one side of the substrate, and a second hologram element provided on another side of the substrate. The first hologram element is provided to overlap with the second hologram element in a front view. The first hologram element includes a first hologram layer that diffracts part of incident light in a first wavelength band and that transmits another part of the incident light in the first wavelength band. The second hologram element includes a second hologram layer that diffracts, toward the first hologram layer through diffraction, part of light in the first wavelength band transmitted through the first hologram layer and that transmits other part of the light in the first wavelength band transmitted through the first hologram layer.

Optical element and virtual image display device

Provided is a virtual image display device including an imaging light emitting device, a light-guiding member configured to guide imaging light emitted from the imaging light emitting device, and an emission-side diffraction element provided at a light-emitting portion of the light-guiding member and configured to emit the imaging light by diffraction. In the emission-side diffraction element, a light amount difference between a first component light and a second component light of the imaging light, the first component light being emitted as a central image at a first angle φ of 0° and the second component light being emitted as a peripheral image at a second angle φ of ±θ (θ>0°), is equal to or less than 20%.

Virtual image display device

A light flux diameter expanding element includes a light guiding plate with a light input face and a light output face, and with a thickness of 0.2 mm to 0.8 mm; a diffraction grating on the input side; and a diffraction grating on the output side, and is provided so as to have the same grating period as that of the diffraction grating on the input side, in which a forming region of the diffraction grating on the input side is smaller than that of the output side, and a grating period of the diffraction grating on the input side is a period in which a small diffraction angle in diffraction angles of +1-st order diffracted light and −1-st order diffracted light, which are diffracted in the diffraction grating on the input side, in the light guiding plate becomes larger than a critical angle of the light guiding plate.

Light flux diameter expanding element and image display device

A display device of the present disclosure includes a substrate, a lens layer including a lens, a light-transmitting layer that contacts a lens surface of the lens, and has translucency, a pixel electrode disposed between the substrate and the lens layer, and a color filter disposed between the pixel electrode and the lens layer. The lens is disposed so as to correspond to the pixel electrode. A refractive index of a constituent material for the lens is lower than a refractive index of a constituent material for the light-transmitting layer.

Display device having lens and light-transmitting layer, and electronic apparatus

An optical device of the present disclosure includes a first light guide body including a first light-incident portion provided with a first incidence-side diffraction element, and a second light guide body including a second light-incident portion provided with a second incidence-side diffraction element, wherein the second light guide body, when light is caused to enter the first light-incident portion, is disposed at a position at which a part of the light passing through the first light guide body enters the second light-incident portion, and the second incidence-side diffraction element is an element that diffracts light of monochromatic color at a smaller angle than the first incidence-side diffraction element does, when the light of monochromatic color is caused to enter at a same angle.

Optical device and image display apparatus

Included are a first display element configured to display a first virtual image; a second display element configured to display a second virtual image; a combining optical member configured to combine first imaging light and second imaging light; a light-guiding optical system configured to guide light that passed through the combining optical member; and a correction optical system provided between the first display element and the combining optical member and configured to correct an aberration in accordance with a positional difference between the first display element and the second display element.

Virtual image display device and optical unit

A light flux diameter expanding element includes a light guiding plate with a light input face and a light output face, and with a thickness of 0.2 mm to 0.8 mm; a diffraction grating on the input side; and a diffraction grating on the output side, and is provided so as to have the same grating period as that of the diffraction grating on the input side, in which a forming region of the diffraction grating on the input side is smaller than that of the output side, and a grating period of the diffraction grating on the input side is a period in which a small diffraction angle in diffraction angles of +1-st order diffracted light and &#x2212;1-st order diffracted light, which are diffracted in the diffraction grating on the input side, in the light guiding plate becomes larger than a critical angle of the light guiding plate.

The image display device includes an image generating unit that emits first image light, a pupil expanding element that expands a diameter of a light flux included in the first image light from the image generating unit to obtain second image light, a first light condensing optical system that condenses the second image light and forms an intermediate image, and a second light condensing optical system that condenses light from the intermediate image and generates a virtual image on eye of a viewer, in a plane including at least the image generating unit, the pupil expanding element, and the eye of the viewer, a maximum emission angle of the first image light is smaller than a maximum viewing angle of the virtual image, and the diameter of the light flux included in the second image light is greater than that of a light flux included in the virtual image.

Image display device having maximum emission angle of image light smaller than maximum viewing angle of virtual image

A display device is provided that includes a substrate, a lens layer including a lens, a light-transmitting layer contacting a lens surface of the lens and having translucency, a pixel electrode disposed between the substrate and the lens layer, and a color filter disposed between the pixel electrode and the lens layer. The lens is disposed correspondingly to the pixel electrode. A refractive index of a constituent material for the lens is higher than a refractive index of a constituent material for the light-transmitting layer.

Display device having pixel electrode and color filter, and electronic apparatus

An image display device includes, an imaging light generation part configured to generate an imaging light having a single color, a light-guiding plate, an incident side diffraction element provided at a light incident part of the light-guiding plate, and configured to cause the imaging light to enter the light-guiding plate, an exit side diffraction element provided at a light emitting part of the light-guiding plate, and configured to cause the imaging light propagating within the light-guiding plate to exit, and an angle dependent reflective film provided between the light-guiding plate and the exit side diffraction element, and having a reflectance varying depending on magnitude of a propagation angle of the imaging light, in which the reflectance for the imaging light propagating at a relatively small propagation angle is larger than the reflectance for the imaging light propagating at a relatively large propagation angle.

Image display device for providing uniform brightness in virtual image

A virtual image display device of the invention includes an image display element configured to emit image light, a relay optical system configured to generate an intermediate image of the image light emitted from the image display element, and an ocular optical element configured to reflect the intermediate image toward a position assumed to be a position of an eye of an observer to generate an enlarged virtual image. The relay optical system includes a prism, and the prism includes a first bending surface including a bending surface and serving as an incident surface, a second bending surface including a bending surface and serving as an emission surface, and a reflecting surface configured to reflect, toward the second bending surface, the image light incident from the first bending surface.

An illuminating device includes light emitting elements extending in a lengthwise direction and a light guide plate having a first principal surface for emitting light from the light emitting elements and a second principal surface facing the first principal surface. The light guide plate has light guide regions corresponding to the light emitting elements. The light emitting elements overlap the light guide plate on a side of the second principal surface of the light guide plate in plan view. The side of the second principal surface of the light guide plate has first sectional surfaces, on which light originated from each of the light emitting elements is incident. The side of the second principal surface of the light guide plate has second sectional surfaces, each having a reflection surface for reflecting the light originated from each light emitting element toward the first sectional surface, corresponding to the light emitting elements.

Illuminating device and liquid crystal display apparatus

A display apparatus includes an image forming device, first and second light guide members that respectively have first and second light incidence portions and first and second light emission portions, a first diffractive optical element provided in the first light emission portion, a second diffractive optical element provided in the second light emission portion, and a first external light noise reduction element provided over the second light guide member. The first external light noise reduction element overlaps the first and second light emission portions. The first light incidence portion overlaps the second light incidence portion. Image light from the image forming device is incident on the first light incidence portion. A part of the image light is guided in the first light guide member. Another part of the image light is incident on the second light incidence portion and is guided in the second light guide member.

Display apparatus

Growing community of inventors

Shiojiri, Japan

Osamu Yokoyama