356results about How to "Increase display contrast" patented technology

An apparatus of driving the liquid crystal display of the present invention includes a picture quality improving unit that receives input data for a frame, wherein the picture quality improving unit analyzes green input data to determine a brightness of the frame and performs a gamma compensation on the input data in accordance with the brightness of the frame to generate output data; and a timing controller that rearranges the output data to supply the rearranged output data to the data driver.

After a gate insulating film is formed over a gate electrode, in order to improve the quality of a microcrystalline semiconductor film which is formed in an early stage of deposition, a film near an interface with the gate insulating film is formed under a first deposition condition in which a deposition rate is low but the quality of a film to be formed is high, and then, a film is further deposited under a second deposition condition in which a deposition rate is high. Then, a buffer layer is formed to be in contact with the microcrystalline semiconductor film. Further, plasma treatment with a rare gas such as argon or hydrogen plasma treatment is performed before formation of the film under the first deposition condition for removing adsorbed water on a substrate.

An image display device includes an image generating device, a light guide unit which includes a light guide plate and first and second deflection sections, and a light beam extension device which extends light incident from the image generating device, along a Z direction when an incident direction of light incident on the light guide plate is set to be an X direction and a direction of propagation of light in the light guide plate is set to be a Y direction, and emits the light to the light guide unit, wherein the light beam extension device includes a first reflecting mirror on which light from the image generating device is incident, and a second reflecting mirror which emits light incident from the first reflecting mirror to the light guide unit, and each of the first and second reflecting mirrors has a light reflecting surface having a sawtooth-shaped cross-sectional shape.

The invention discloses a liquid crystal display device comprising a decoding module, a time sequence control module, a liquid crystal drive module, a backlight drive module, a liquid crystal displaypanel and an LED backlight module. The liquid crystal display device is characterized by further comprising a dynamic backlight control module. The invention further discloses a method for processinga digital image signal of a liquid crystal display adjusting device. The invention adopts a method for independently controlling backlight subareas to be capable of reducing or even closing the backlight at parts with darker pictures and really darkening the backlight, so as to improve the picture contrast ratio and change the backlight brightness according to the change of the pictures by independently controlling the backlight subareas, thus reducing power consumption.

The invention discloses a display device and a display method thereof. The display device comprises an average gray level calculating unit, a gamma correction unit, a gamma generating unit, a backlight control unit and a source driving unit. The backlight control unit and the gamma correction unit choose an adaptive backlight control signal and a gamma correction curve voltage according to an average grey level value of an average grey level representing the whole image calculated by the average gray level calculating unit so as to ensure that the display device dynamically regulates backlight luminance according to image data and improve relative contrast ratio of a display image through gamma correction. The low power consumption and the high definition display of the display device are realized.

A liquid crystal display (LCD) with a built-in touch panel includes an LCD unit, a touch panel and a second polarized plate. The LCD unit includes a lower substrate, an upper substrate, a liquid crystal layer and a first polarized plate. The upper substrate is disposed opposite to the lower substrate, and the liquid crystal layer is disposed between the lower substrate and the upper substrate. The first polarized plate is disposed on the lower substrate and has a first polarized direction. The touch panel is disposed opposite to the LCD unit. The second polarized plate having a second polarized direction is disposed on the touch panel and located between the LCD unit and the touch panel. An intensity of a reflected light occurred in the LCD with the built-in touch panel is relatively low, so that good contrast and visibility are obtained.

PURPOSE: A coloring composition for color filter has excellent dispersibility, mobility stability, and developability, and provided to form the black matrix pattern with high optical concentration and the color filter segment of high contrast ratio. CONSTITUTION: A coloring composition for color filter contains a coloring agent and a resin type dispersing agent and a solvent. The average diameter of the coloring agent is 20-50nm, and the coloring agent contains a pigment of which aspect ratio is 1:1-1:3.5. The resin type dispersing agent is AB block copolymer or B-A-B block copolymer(A block has solvent-philicity, and B block contains functional group including nitrogen atom), and contains acrylic block copolymer of which amine value is 10-99mgKOH / g or less(on the basis of solid shape).

A cold cathode field emission display comprising at least (A) a display panel having a cathode panel CP provided with a plurality of electron-emitting regions EA and an anode panel AP provided with a phosphor layer 31 and an anode electrode 34, said cathode panel and said anode panel being bonded to each other in their circumferential regions, (B) a focus-electrode control circuit 41, (C) a resistance element R, and (D) a capacitor C, in which the focus electrode 15 formed in the electron-emitting region EA is connected to a first voltage-output portion 41A of the focus-electrode control circuit 41 through the resistance element R, and the focus electrode 15 is further connected to a second voltage-output portion 41B of the focus-electrode control circuit 41 through the capacitor C.

The invention discloses a liquid crystal display adjusting device, which comprises a liquid crystal driving module, a backlight driving module, an image signal receiving module, an image caching module, an image analyzing module, a liquid crystal gray scale adjusting module, and a backlight brightness adjusting module. The invention also discloses a method for processing digital image signals forthe liquid crystal display adjusting device, and a liquid crystal display.

A liquid crystal display device, for displaying pure white, has a first substrate having first electrodes formed thereon; a second substrate positioned to face the first substrate and having second electrodes formed thereon; a liquid crystal sealed between the first and second substrates; and first and second polarization plates arranged to sandwich the first and second substrates and having such polarization characteristics that when the first and second polarization plates are placed one on the other in such a way as to have substantially perpendicular transmission axes, a value acquired by dividing a transmittance of light with a wavelength of 500 nm by a transmittance of light with a wavelength of 440 nm becomes substantially smaller than 0.4. The first and second polarization plates have optical characteristics such that when the first and second polarization plates are placed one on the other in such a way as to have substantially parallel transmission axes, a value acquired by subtracting a transmittance of light with a wavelength of 640 nm from a transmittance of light with a wavelength of 460 nm is greater than -3%.

A liquid crystal device, materials for making the device, and method of making and using the device, and several applications of the device, having memory is responsive to respective inputs to assume respective optical responses; the liquid crystal may be liquid crystal microencapsulated in a containment medium; the memory capability of the device allows the device to hold a prescribed optical response condition even though one of the inputs changes between respective states or values.

A method for manufacturing a liquid crystal display panel is provided. A photo-alignment layer is formed on a first substrate. Patterned pixel electrodes including intersected electrodes and stripe electrodes are formed on a second substrate. A liquid crystal layer is formed between the photo-alignment layer and the patterned pixel electrodes. Each intersected electrode has a first directional portion and a second directional portion interlacing thereto. The stripe electrodes with silts connect the first and / or the second directional portions. When an electric field between the first and the second substrates is substantially zero, liquid crystal molecules near the photo-alignment layer are arranged at a pre-tilt angle, while those disposed at another side near the second substrate are substantially perpendicular to the second substrate. As the liquid crystal layer is driven, the liquid crystal molecules of the liquid crystal layer are substantially arranged along an extending direction of the slits.

PCT No. PCT / JP96 / 03303 Sec. 371 Date Jul. 9, 1997 Sec. 102(e) Date Jul. 9, 1997 PCT Filed Nov. 11, 1996 PCT Pub. No. WO97 / 17630 PCT Pub. Date May 15, 1997A polymer dispersed liquid crystal electro-optical device comprising a liquid crystal polymer complex layer having a liquid crystal and a polymer, wherein said liquid crystal and said polymer are aligned in the same direction when no electric field is applied, and an electrode structure formed on each side of said liquid crystal polymer complex layer for applying an electric field to said liquid crystal polymer complex layer to align said liquid crystal along the electric field so as to render said liquid crystal polymer complex layer in a light-scattering state. The liquid crystal polymer complex layer is formed by dissolving a liquid crystal and a polymer precursor to form a solution; adding a compound in which at least one hydrogen atom in a benzene ring is substituted by a hydroxy group or a compound having a benzene ring with a hydroxy group as a basic skeleton to said solution; polymerizing said polymer precursor to from a polymer; and phase separating said liquid crystal and said polymer to form a liquid crystal polymer complex layer. The compound improves the initial refractive index, and the refractive index and contrast after energize-aging.

On a transparent glass substrate (10), a first phase difference compensating layer (12) and a second phase difference compensating layer (14), which are formed of inorganic material, are provided. The first phase difference compensating layer (12) includes a stacked two kinds of deposition films sufficiently thinner than reference wavelength, one has high refraction index, and the other has low refraction index, to be a negative C-plate. The second phase difference compensating layer (14) includes at least two oblique deposition films, to be a positive O-plate. The first phase difference compensating layer (12) compensates a phase difference from liquid crystal molecules in a vertical orientation in a liquid crystal layer, and the second phase difference compensating layer (14) compensates a phase difference from liquid crystal molecules in a hybrid orientation in the liquid crystal layer.

Briefly, according to one aspect of the invention, liquid crystal material is microencapsulated by a method utilizing an interfacial polymerization reaction which creates a combination of polyurethane and polyurea polymers which form the capsule walls surrounding the discrete liquid crystal droplets. The formed capsule walls are designed to have an adjustable refractive index so as to allow for the matching of the refractive index to that of the liquid crystal and polymeric binder materials. This allows for the production of a liquid crystal droplet surrounded by polymer film, which is optically clear when the liquid crystal director is aligned with the electric field. The microencapsulated liquid crystal droplets improves the dye stability of a dichroic dye and enhances the contrast of a liquid crystal display.

A plasma display panel has plural discharge cells between two opposing first and second substrates. Each of the discharge cells includes at least one pair of electrodes for generating a discharge for display, a discharge gas and a phosphor film for emitting visible light by being excited by ultraviolet rays produced by the discharge of the discharge gas. Laminated members are dispersed in a plane within each of the discharge cells inside the first substrate from which visible light for display is emitted, and each of the laminated members includes a light absorption layer disposed on a side of the first substrate on which ambient light is incident and a light reflection layer disposed on a phosphor-film side of the laminated members. A visible-light-reflection layer is disposed on a surface of the phosphor film on a side thereof opposite from a space in which the discharge is generated.

A first display element 1 and a second display element 2 are provided in a stacked configuration. The first display element 1 includes a liquid crystal panel 10 in which a liquid crystal layer 18 is held between first and second transparent substrates 11 and 12, a reflective polarization plate 3 that is provided on the side of the first transparent substrate 11 and a polarization plate 4 that is provided on the side of the second display element 2. In the example shown in FIG. 1, the reflective polarization plate 3 and polarization plate 4 are common to the first display element 1 and the second display element 2. The reflective polarization plate 3 transmits light that oscillates in a specified direction and reflects light that oscillates in a direction intersecting with the specified direction, and is joined directly to the liquid crystal panel 10 via an adhesive layer with a uniform refractive index.

The invention discloses polymer and liquid crystal composition and liquid crystal handwriting display device using the same. The polymer and liquid crystal composition comprises a polymer and a liquid crystal which are mutually soluble, wherein the polymer comprises 30-70 parts of an oligomer monomer, 0.5-3 parts of a photoinitiator, 30-70 parts of an oligomer, 0.1-1 part of an adhesion promoter and 5-50 parts of a diluent. The invention further discloses a preparation method of the liquid crystal handwriting display device. The liquid crystal handwriting display device adopting the polymer and the bi-stable cholesteric liquid crystal has high display contrast, low driving voltage and sensitivity in handwriting, furthermore, electricity is not consumed in a handwriting displaying process and is only consumed at a refresh moment, handwriting refresh can be performed for millions of times, and the handwriting display device is environment-friendly.

The invention provides a pixel structure for a displaying device and the displaying device, wherein the pixel structure uses a light entering from the outside of the displaying device as a light source. The pixel structure comprises a first substrate, a light barrier layer, an active element and a moveable light shielding layer, wherein the light barrier layer is arranged on the first substrate and provided with a transparent area and a lightproof area; the active element is arranged in the lightproof area of the light barrier layer and has a first state and a second state; and the moveable light shielding layer is arranged on the light barrier layer and the active element. When the active element is in the first state, the moveable light shielding layer properly shields the transparent area so as to prevent the light from emitting out from the first substrate; and when the active element is in the second state, the moveable light shielding layer is driven to allow the light ray to passes through the transparent area and to be projected out from the first substrate.

In an IPS liquid crystal display device, a reduction in optical leakage from the outer peripheral portion (edge portion) of an electrode pattern in flexed configuration and an improvement in the contrast of display on a screen are intended. An IPS liquid crystal display device of the present invention has a plurality of signal lines and scan lines arranged as a matrix on a TFT substrate, TFT switching elements, and comb-like pixel electrodes connected to the TFT switching elements. In a pixel region, a comb-like common electrode is formed in interdigitated relation with the pixel electrodes. The pixel electrodes, the common electrode, and the signal lines are formed in mutually parallel and flexed configuration at a given angle relative to an optical axis. The outer edge of each of the pixel electrodes, the common electrode, and the signal lines is added with fine stairwise fine stepped portions composed of the same material as composing the electrodes and lines. The stepped portions prevent optical leakage from the outer peripheral portion of the flexed electrode pattern.

A method of manufacturing a liquid crystal display panel is provided. A photo-alignment layer and a patterned pixel electrode are formed on a first and a second substrates respectively. A liquid crystal layer is formed between the photo-alignment layer and the patterned pixel electrode. The patterned pixel electrode includes intersected electrodes having a first directional portion and a second directional portion intersected therewith, and stripe electrodes having slits therebetween connect at least one of the first directional portion and the second directional portion. When an electric field between the first and the second substrates is substantially zero, the liquid crystal molecules near the photo-alignment layer have a pre-tilt angle while those on another side are substantially perpendicular to the second substrate. As the liquid crystal layer is driven, the liquid crystal molecules of the liquid crystal layer are substantially arranged along an extending direction of the slits.

An object is to provide a manufacturing method of a microcrystalline semiconductor film with favorable quality over a large-area substrate. After forming a gate insulating film over a gate electrode, in order to improve quality of a microcrystalline semiconductor film formed in an initial stage, glow discharge plasma is generated by supplying high-frequency powers with different frequencies, and a lower part of the film near an interface with the gate insulating film is formed under a first film formation condition, which is low in film formation rate but results in a good quality film. Thereafter, an upper part of the film is deposited under a second film formation condition with higher film formation rate, and further, a buffer layer is stacked on the microcrystalline semiconductor film.

The present invention provides a liquid crystal composition including a siloxane polymer, a nematic liquid crystal compound substituted with at least one fluorine atom, and at least one dichroic dye; and a liquid crystal composition including a siloxane polymer having liquid crystalline group at the side chain of the polymer, a low molecular-weight liquid crystal compound, and a dichroic dye, in which the dielectric constant anisotropy of the liquid crystal composition is changed from being positive to being negative when the frequency of the voltage to be applied is increased.

The invention relates to the field of LED (Light-Emitting Diode) packaging, in particular to an LED display screen. The LED display screen comprises a lamp panel and LED lamp beads arranged on the lamp panel, wherein light absorption face masks are arranged on the lamp panel and are positioned among the LED lamp beads; the widths of the light absorption face masks are gradually reduced from the ends in contact with the lamp panel to the opposite ends. The light absorption face masks are arranged among the LED lamp beads for absorbing external light, so that external stray light is reduced, and the display contrast ratio is promoted; meanwhile, the structures of the light absorption face masks are improved, so that the widths, at the ends in contact with the lamp panel, of the light absorption face masks are greater than those at the other ends opposite to the ends in contact with the lamp panel, the widths, at the ends far away from the lamp panel, of the light absorption face masks are arranged in a reduced mode, the absorption and blocking of light absorption walls of the light absorption face masks for red, green and blue light rays in the LED lamp beads are reduced, the visual angle of the display screen is enlarged, and the visual color difference is eliminated as much as possible. Meanwhile, the using material of the light absorption face masks is further reduced, and the product cost is reduced.