Lg Philips Lcd Co., Inc.

Lg Display Co., Ltd.

G. Philips Lcd Co., Ltd.

Jong-Weon Moon

Sunghoe Yoon

Su-Hyun Park

Ji-yong Kim

Hee-Nam Hwang

Jae-Hong Hur

Joun-Ho Lee

Mun-Chul Kim

Sung-Hoe Yoon

A transmissive liquid crystal display device includes first and second substrates spaced apart and facing each other, a cholesteric liquid crystal (CLC) color filter layer on an inner surface of the first substrate, the CLC color filter layer including first areas for displaying R, G and B and second areas between adjacent first areas, a first polarizer on an outer surface of the first substrate, a backlight unit on the first polarizer, a retardation plate on an outer surface of the second substrate, a second polarizer on the retardation plate, and a liquid crystal layer between the first and second substrates.

Method of manufacturing cholesteric liquid crystal (CLC) color filter layer and transmissive liquid crystal display device having the CLC color filter layer according to the method

A liquid crystal display device having a cholesteric liquid crystal (CLC) color filter comprises a first substrate, a circular polarizer on the first substrate, a cholesteric liquid crystal (CLC) color filter on the circular polarizer, a first electrode on the cholesteric liquid crystal (CLC) color filter, a second substrate spaced apart from the first substrate, a second electrode beneath the second substrate, a liquid crystal layer between the first and second electrodes, a back light under the first substrate, a diffusive film on the second substrate, a retardation layer on the diffusive film, and a linear polarizer on the retardation layer.

Cholesteric liquid crystal (CLC) display device and method for manufacturing the same

A liquid crystal display device includes: first and second substrates facing and spaced apart from each other; a retardation layer on an outer surface of the first substrate; a linear polarizing layer on the retardation layer; a cholesteric liquid crystal color filter (CCF) layer on an inner surface of the second substrate; a liquid crystal layer between the first substrate and the CCF layer; a first cholesteric liquid crystal (CLC) polarizing layer on an outer surface of the second substrate, the first CLC polarizing layer having a first helical pitch of a first circular polarization direction; a second cholesteric liquid crystal (CLC) polarizing layer on the first CLC layer, the second CLC polarizing layer having a second helical pitch of a second circular polarization direction opposite to the first circular polarization direction; and a backlight unit outside the second CLC layer.

Liquid crystal display device using cholesteric liquid crystal

A fabricating method of a substrate for a liquid crystal display device includes: coating a cholesteric liquid crystal material on a substrate to form a cholesteric liquid crystal layer, the substrate having a plurality of sub-pixel regions; disposing a mask having a plurality of open portions over the cholesteric liquid crystal layer; irradiating the cholesteric liquid crystal layer through the mask and curing the cholesteric liquid crystal layer, wherein each open portion is smaller than each sub-pixel region.

Method for fabricating a liquid crystal display device having cholesteric liquid crystal color filter layer with high aperture ration

A reflective liquid crystal display device includes first and second substrates spaced apart and facing each other, a gate line and a data line on an inner surface of the first substrate and crossing each other to define a pixel area, a thin film transistor electrically connected to the gate and data lines, a passivation layer covering the thin film transistor, a blocking layer on the passivation layer and corresponding to the thin film transistor, a pixel electrode on the passivation layer and connected to the thin film transistor, a retardation film on an outer surface of the first substrate, a polarizer on the retardation film, an absorption layer on an inner surface of the second substrate, a cholesteric liquid crystal color filter layer on the absorption layer, a common electrode on the cholesteric liquid crystal color filter layer, and a liquid crystal layer between the common electrode and the pixel electrode, wherein the data line overlaps adjacent pixel electrodes and a overlapping width is over 50% of a width of the data line.

Reflective liquid crystal display device

A liquid crystal display device of the present invention includes: first and second substrates including a plurality of pixels, wherein each pixel divided into first to third sub-pixels; a double-layered cholesteric liquid crystal color filter (CCF) layer over the first substrate, the double-layered CCF layer including a first CCF layer including first and second CCF with a ratio of 1:2 in size and a second CCF layer including third and fourth CCF with a ratio of 2:1 in size; a first transparent electrode on the double-layered CCF layer; a second transparent electrode on the second substrate; a liquid crystal layer between the first and second transparent electrodes; and a backlight device adjacent to the first substrate and emitting light toward the first and second substrates.

Transmissive liquid crystal display device having a cholesteric liquid crystal color filter and method of fabricating the same

Method for fabricating a liquid display device having cholesteric liquid crystal color filter layer with high aperture ratio

A reflective cholesteric liquid crystal (CLC) display device has a reflection layer in or on a cholesteric liquid crystal color filter to increase a luminance and a contrast ratio of a liquid crystal display device. A reflective cholesteric liquid crystal display device includes a first substrate, an absorption layer on the first substrate, a cholesteric liquid crystal color filter on the absorption layer, a reflection layer on the absorption layer, the reflection layer reflecting light in a whole range of wavelengths, a first electrode on the cholesteric liquid crystal (CLC) color filter, a second substrate spaced apart from and over the first substrate, a second electrode beneath the second substrate, a retardation layer on the second substrate, a polarizer on the retardation layer and a liquid crystal layer between the first electrode and the second electrode.

Cholesteric liquid crystal display device with reflectors and manufacturing method for the same

A transmissive liquid crystal display device includes first and second transparent substrates spaced apart from each other; a cholesteric liquid crystal color filter on the first substrate; a common electrode on the cholesteric liquid crystal color filter; an array of elements arranged on a first surface of the second transparent substrate facing the first transparent substrate; a hologram diffuser formed on a second surface of the second transparent substrate opposing to the first surface; a liquid crystal layer interposed between the first and second transparent substrates; and a backlight device adjacent to the first transparent substrate.

Transmissive liquid crystal display device including hologram diffuser

A reflective liquid crystal display device includes first and second substrates facing and spaced apart from each other; a first transparent electrode beneath the first substrate; a light absorption layer on the second substrate; a cholesteric liquid crystal (CLC) color filter layer on the light absorption layer, the CLC color filter layer being multi-layered and each layer of the CLC color filter including sub-color filters for red, green and blue colors arranged in an alternating order; a second transparent electrode on the CLC color filter layer; and a liquid crystal layer interposed between the first and second transparent electrodes. The CLC color filter layer may be single-layered and each sub-color filter may include a plurality of regions having a different central wavelength of reflection. The CLC color filter layer may be multi-layered with each sub-color filter including a plurality of regions having a different central wavelength of reflection.

Reflective liquid crystal display device using a cholesteric liquid crystal color filter

A reflective liquid crystal display device include an upper substrate, a lower substrate, a liquid crystal layer interposed between the upper and lower substrates, a common electrode beneath the upper substrate, a plurality of orthogonal gate lines and data lines disposed on the lower substrate, a plurality of thin film transistors located near a crossing region of the gate and data lines, each of the plurality of thin film transistors include source and drain electrodes, a light absorption layer formed on each of the plurality of thin film transistors, a cholesteric liquid crystal color filter formed on the light absorption layer, and a plurality of pixel electrodes formed on the cholesteric liquid crystal color filter layer.

A transflective liquid crystal display device that can selectively be used in the transmissive mode or the reflective mode. The transflective liquid crystal panel includes a reflective electrode having a transparent portion, a CLC color filter and a CLC polarizer. Light from a backlight device can pass through the transparent portion of the reflective electrode and into the liquid crystal. Moreover, light from the backlight device that is reflected by the reflective electrode can also pass through the transparent portion and into the liquid crystal without being absorbed by the CLC polarizer. The brightness of the transflective LCD device is thus improved.

Growing community of inventors

Annyang-si, South Korea

Jong-Weon Moon