Abstract:
This invention relates to a transflective liquid crystal display device, having a plurality of pixels (1), each comprising a liquid crystal layer (2) being sandwiched between a front and a back substrate (4, 5), a back light (10), a semi-transparent reflective element (7), being arranged between the back substrate (5) and the back light (5), a front polariser (6), and a driving arrangement (3) for controlling optical properties of the liquid crystal layer (2), whereby the pixel is subdivided into a reflective pixel part (1a) and a transmissive pixel part (1b). According to the invention, a cholesteric layer composition (11, 12) is arranged between said liquid crystal layer (2) and the back substrate (5), said cholesteric layer composition comprising; in said reflective pixel part (1a), a first cholesteric layer composition part (11) for reflecting a desired primary pixel colour, and in said transmissive pixel part (1b) a second cholesteric layer composition part (12) for reflecting the remaining primary colours, other than said desired primary pixel colour.
Abstract:
The present invention relates to a display device comprising a substrate, at least one UV curable conductive layer and an imageable layer. The present invention also relates to a display device comprising a substrate, a first transparent conductive layer, a light modulating layer, and a second conductive layer, wherein the second conductive layer is UV curable.
Abstract:
The invention provides a liquid crystal display device including switching elements and a reflection layer having low heat resistance. The liquid crystal display device is capable of reducing or preventing a degradation in the characteristics of the reflection layer due to heating in the manufacturing process. A liquid crystal display device includes a pair of opposing substrates, and a liquid crystal interposed between the substrates. A reflection layer is formed on the substrate, and switching elements (TFDs) to drive the liquid crystal are formed on the liquid crystal side of the substrate. The reflection layer is formed of any one of a dielectric reflection film, a cholesteric reflection film, and a holographic reflection film.
Abstract:
The method of making an optical body includes coating a mixture that includes a plurality of cholesteric liquid crystal compositions, and a solvent on a substrate. Each cholesteric liquid crystal composition is different. A plurality of layers is formed on the substrate. Each layer includes a majority of one of the cholesteric liquid crystal compositions.
Abstract:
A liquid crystal display device includes first and second substrates having inner surfaces facing and spaced apart from each other; a light absorption layer on an inner surface of the first substrate; a cholesteric liquid crystal color filter (CCF) layer on the light absorption layer for selectively reflecting light corresponding to one of red, green, and blue colors; a first transparent electrode on the CCF layer; a first orientation film on the first transparent electrode; a second transparent electrode on the inner surface of the second substrate; a second orientation film on the second transparent electrode, the first and second orientation films being rubbed along the same direction; a polarizing plate on an outer surface of the second substrate; and a layer of liquid crystal material between the first and second orientation films, wherein the layer of liquid crystal material has a bend structure.
Abstract:
A phase difference plate and a liquid-crystal layer are provided between a polarizing plate and a selective reflection layer formed of cholesteric liquid crystal. A first color filter layer is provided on the polarizing plate side of the selective reflection layer. On the back side of the selective reflection layer, a second color filter layer is arranged. On the back side of the second color filter layer, a backlight is provided. When a liquid-crystal display device functions as a reflective liquid-crystal display device, light entering through the polarizing plate is reflected totally by the selective reflection layer and passes through the first color filter layer twice. When the liquid-crystal display device functions as a transmission liquid-crystal display device, light from the backlight passes through the selective reflection layer. Then, the light passes through the second and first color filter layers once and is outputted.
Abstract:
The invention relates to a liquid crystal display constructed such that the efficiency of utilization of light is improved by use of a cholesteric liquid crystal filter thereby ensuring color density enough to enable both the transmission type display and the reflection type display. The liquid crystal display comprises a liquid crystal display device comprising a liquid crystal layer 3 sandwiched between transparent substrates 1 and 2 and a voltage applying electrode and a driving circuit, an illumination light source 9, a circularly polarizing plate 10 and a circularly polarizing plate 11. A cholesteric liquid crystal filter 4 of the type semitransparent to light in all red, green and blue wavelength ranges is located on the illumination light-directing side of the liquid crystal layer 3. The liquid crystal layer 3 is provided on its viewing side with an array form of cholesteric liquid crystal color filter 5 capable of transmitting only light in the red, green and blue wavelength ranges and reflecting light in other wavelength ranges depending on a pixel arrangement, and an array form of absorption type color filter that is located in alignment therewith and capable of transmitting only light in the red, green and blue wavelength ranges and absorbing light in other wavelength ranges.
Abstract:
The invention provides a liquid crystal display device that is excellent in presenting a bright and visible display in a wide viewing angle. A transflective layer formed of cholesteric liquid crystal layers, each having a plurality of unflat portions, and reflecting at least a portion of elliptically polarized light having a predetermined rotation direction, is arranged on the inner surface of a lower substrate. An upper-substrate side elliptically-polarized-light input device is arranged to allow elliptically polarized light to enter a liquid crystal layer from an upper substrate. The liquid crystal layer reverses the component of the elliptically polarized light which is incident during one of electric field applied state and electric field non-applied state, while not changing the component of the elliptically polarized light during the other of the electric field applied state and the electric field non-applied state.
Abstract:
The invention provides a liquid crystal display device including switching elements and a reflection layer having low heat resistance. The liquid crystal display device is capable of reducing or preventing a degradation in the characteristics of the reflection layer due to heating in the manufacturing process. A liquid crystal display device includes a pair of opposing substrates, and a liquid crystal interposed between the substrates. A reflection layer is formed on the substrate, and switching elements (TFDs) to drive the liquid crystal are formed on the liquid crystal side of the substrate. The reflection layer is formed of any one of a dielectric reflection film, a cholesteric reflection film, and a holographic reflection film.
Abstract:
A colour switch for selectively switching between colour bands for use in projection optics and in direct view optics has fewer and thinner layers than in the prior art, but exhibits equal or better colour purity and light efficiency. The filter has a first filter section (2-8) for selectively blocking green light and including a cholesteric filter (2), a quarter wave plate (4) and a liquid crystal switch (6). The filter has a second filter section (10-22) for selectively blocking blue and/or red light including a stack of retarder elements (10, 14, 16, 20) and liquid crystal switches (12, 18), preferably DHF switches. The parameters of the filter are determined by an optimisation process including minimising a cost function G with respect to the parameters of the second filter section. Polarising element (8) may be positioned in front of the stack, and of a type which does not absorb radiation.