Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Adrian Derek Geisow

Stephen Christopher Kitson

John Christopher Rudin

Peter Mardilovich

Gary A Gibson

Jian-Gang Weng

Timothy Simon Taphouse

Mario Ariosto Matranga

Susanne Klein

Christopher Newton

Sarwat Amreen Baig

Adrian Arnold Buriks

Gary George Wells

Roy Stephen Marriott

Jessica Louise Boland

Andrew David Wells

Gary Alfred Gibson

A reflective structure with transparent and semi-transparent transmission regions and includes a first transparent layer with a textured area, a reflective layer disposed below the first transparent layer and having a portion that is substantially conformal with at least a first portion of the textured area, and a second transparent layer disposed below the reflective layer and having a portion with a refractive index that is substantially equal to a refractive index of the first transparent layer. The transparent transmission region is configured to transmit a portion of light without substantial deviation, and the semi-transparent transmission region is configured to transmit another portion of the light from the first transparent layer with substantial deviation.

Reflective structure with transparent and semi-transparent transmission regions

A display includes a backlight (). In addition, the display includes for each of at least one wavelength band, a plurality of layers placed above the backlight (). The plurality of layers includes an absorption layer (), a luminescent layer () and a reflective layer (). The absorption layer () is capable of absorbing light in a wavelength band while being substantially transparent to light in other wavelength bands. The luminescent layer () is capable, in response to light from the backlight (), of emitting light within the wavelength band. The reflective layer () is adapted to reflect light in the wavelength band while being substantially transparent to light in other wavelength bands.

Display with backlight

A transflective display () includes a backlight () and a display stack ('). The display stack () includes a first electro-optic layer () configured to modulate light of a first waveband and a second electro-optic layer () configured to modulate light of a second waveband that is different from the first waveband. A mirror () is positioned between the first and second electro-optic layers () such that the first electro-optic layer () is positioned adjacent to a first surface (S) of the mirror () and has a surface (S) that is configured to face an external light source (), and the second electro-optic layer () is positioned adjacent to a second surface (S) of the mirror () and has a surface (S) that is configured to face the backlight (). The mirror () is also configured to partially reflect and partially transmit wavelengths in the first waveband and to at least partially transmit wavelengths in the second waveband.

Transflective displays

A light modulation layer of a full-color reflective display (), the light modulation layer including an addressing layer (); a mirror () positioned above the addressing layer (), the mirror () configured to reflect light of a predetermined wavelength band; and an electro-optic layer () positioned above the mirror (), the electro-optic layer () configured to absorb light of a predetermined wavelength band in response to a signal received from a switching device () of the addressing layer ().

Light modulation layer

A cholesteric reflector comprising a substrate and a first cholesteric layer that is disposed over the substrate and reflects a first polarization of light within a design waveband. A second cholesteric layer is disposed over the first cholesteric layer and reflects a second polarization of light within the design waveband.

Cholesteric reflector

A birefringent diffuser includes a first optical material and a first birefringent material. The first optical material and the first birefringent material are combined to form a planar layer. The planar layer has an internal pattern of the materials presenting a substantially uniform index of refraction for incident light which is substantially normal to the planar layer and exhibiting a varying index of refraction for at least a portion of light which is trapped in guided modes.

Birefringent diffuser

A reflective display device includes a first absorption layer configured to be modulated between being strongly and weakly absorbing of light within a first specified wavelength band and to absorb light weakly in a second specified wavelength band and a third specified wavelength band, a second absorption layer configured to be modulated between being strongly and weakly absorbing of light within the second specified wavelength band and to absorb light weakly within the third specified wavelength band, a third absorption layer configured to be modulated between being strongly and weakly absorbing of light within at least the third specified wavelength band, and at least one reflector arranged between two of the first, second, and third absorption layers, the at least one reflector being configured to reflect light strongly within one of the specified wavelength bands assigned to the absorption layers above the at least one reflector.

Reflective display device

A method of manufacturing a cell wall assembly for an electro-optic display device with greyscale capability comprises: Other aspects of the invention include the cell wall assembly, a device with greyscale capability, a method of manufacturing the device, and the transfer carrier.

Method of manufacturing a display device with greyscale capability

Various reflective display pixels are provided. In one embodiment, among others, a reflective display pixel for modulating the return of incident visible light is provided that includes one or more stacked cells. Each cell includes a fluid containing a light absorbing medium capable of absorbing incident light in at least one specified wavelength band for that cell and a light returning medium capable of selectively returning at least a portion of the light within the specified wavelength band for that cell. In other embodiments, each cell includes a fluid containing a light absorbing medium capable of absorbing incident light in at least one specified wavelength band for that cell and a light returning medium capable of selectively returning at least a portion of visible light outside the specified wavelength band for that cell.

Reflective display pixel

A reflective display device () comprises a plurality of controllable light absorption layers () arranged in a stack. Each of the layers () is capable of absorbing incident light in a specified wavelength band. A selective reflector () is immediately behind at least one of the layers () and is adapted to reflect at least some wavelengths of light within the wavelength band and substantially to transmit light of other wavelengths.

Reflective display

A method of applying to a display substrate color elements and addressing busbars in a defined alignment relative to each other includes: forming said color elements and said busbars on a surface of a transfer carrier; 10 adhering said color elements and said busbars to said display substrate; and removing said transfer carrier.

Applying color elements and busbars to a display substrate

A liquid crystal display device comprises a layer of liquid crystal material () between spaced-apart cell walls (), and electrodes () provided on at least one cell wall for applying an electric field across at least a part of said liquid crystal material. The liquid crystal material has anisotropic light-absorbing particles dispersed therein and substantially aligned therewith. The invention also provides a composition for use in the display.

Liquid crystal display device

A color display device comprises: The color of light transmitted through a pixel is determined by the light transmitted by both the first color filter and the second color filter that intersect at that pixel.

Colour display device and method of manufacture

A liquid crystal device comprises a first cell wall and a second cell wall enclosing a layer of liquid crystal material. The device has electrodes for applying an electric field across at least some of the liquid crystal material, and a surface alignment structure on a region of a substantially planar inner surface of at least the first cell wall. The alignment structure induces the liquid crystal material to adopt a desired alignment in an azimuthal plane. The surface alignment structure comprises a two dimensional array of microstructures which are shaped and oriented to produce the desired alignment. Each microstructure has no plane of symmetry orthogonal to the azimuthal plane and to said planar inner surface.

Growing community of inventors

Portishead, United Kingdom

Adrian Derek Geisow