146 results about "Reduced contrast volume" patented technology

A liquid crystal composition, comprising a liquid crystal and a polymerizable compound capable of polymerization by means of light, heat, or a combination thereof, is placed in the gap between two parallel substrates on which are formed a pair of electrodes, and the polymerizable compound is polymerized to form a liquid crystal layer and a resin film. A liquid crystal display device is manufactured accordingly. The polymerizable compound comprises a monofunctional polymerizable compound, and the dipole moment of the monofunctional polymerizable compound is 4 debyes or lower. Thus, a liquid crystal display device, with high reliability, and of excellent quality with little or no contrast reduction due to white lines, is provided.

A method of performing bilateral filtering and using the method for displaying high-dynamic-range images is presented. The method reduces the contrast of the image while preserving detail of the image. The presently disclosed method incorporates a two-scale decomposition of the image into a base layer encoding large-scale variations, and a detail layer. The base layer has its contrast reduced, thereby preserving detail. The base layer is obtained using an edge-preserving bilateral filter. The bilateral filter is a non-linear filter, where the weight of each pixel is computed using a Gaussian in the spatial domain multiplied by an influence function in the intensity domain that decreases the weight of pixels with large intensity differences. The bilateral filtering is accelerated by using a piecewise-linear approximation in the intensity domain and appropriate subsampling.

A liquid crystal driving device is provided, which can reduce the problem of contrast lowering of the liquid crystal display screen due to the decrease of the driving current of LED, by the control which is performed in order to cope with the decrease of the maximum rated current of LED as a light source of the backlight at a high temperature. The liquid crystal driving device includes a liquid crystal driving circuit, a backlight control unit, and display data expansion circuits. The liquid crystal driving circuit generates a liquid crystal driving signal to be supplied to a liquid crystal display panel in response to display data. The backlight control unit reduces driving current of the light emitting diode as a light source of the backlight module to illuminate the liquid crystal display panel, in response to the temperature rise of the liquid crystal display panel. The display data expansion circuit, in response to the temperature rise of the liquid crystal display panel, performs the data expansion of the display data, and compensates the contrast lowering of the liquid crystal display panel due to the dimming of the backlight module with the temperature rise of the liquid crystal display panel.

The invention relates to a mobile phone backlight control method which comprising the steps of triggering a sensor or a camera on a mobile phone to detect current environment luminance brightness according to an incoming call event or a key action event; adjusting a luminance value of a screen of the mobile phone according to the environment luminance brightness, wherein the higher the environment luminance brightness is, the higher the luminance value of the screen of the mobile phone is; and adjusting a display image of the screen of the mobile phone according to the environment luminance brightness, wherein the high the environment luminance brightness is, the higher an adjusting value is, and the adjusting value comprises a contrast adding value to low brightness pixel and a contrast lowering value to high brightness pixel. According to the mobile phone backlight control method, ambient light induction and image gray scale processing are merged together, ambient light, the displayscreen, backlight of the display screen and backlight of a keyboard are designed into a system, and the dynamic control of the system is conducted by a multipath and efficient adjusting method, so that the power consumption of the backlight is reduced to the largest extent on the premise of not influencing display effect and improving the experience of a user.

A liquid crystal display apparatus, provided with liquid crystal compensation plates and λ/4 plates on both sides of a liquid crystal cell, in a sequence that the liquid crystal compensation plates, then the λ/4 plates. Further provided is Rth compensation film between the λ/4 plate and linear polarization film. Set substantially at zero is a retardation Rth1 in a perpendicular direction in a range from the linear polarization films to the λ/4 plates, excluding the λ/4 plates. This gives a retardation (in a perpendicular direction) for optically compensating the liquid crystal cell a closer position to the liquid crystal cell. As a result, a broad angle of visibility can be maintained, without losing a balance between viewing angle characteristics from the above position (or the bottom position) and those from the right position (or the left position), while it is possible to prevent contrast ratio in a front direction from being lowered. Therefore, an LCD having good display quality can be realized.

A brightness level converting apparatus improves a contrast of an image represented by an image pickup signal output from a logarithmic conversion solid-state image pickup device, so as to obtain a natural image. For this purpose, the brightness level converting apparatus converts brightness levels in the image pickup signal output from the solid-state image pickup device which logarithmically converts an incident light quantity. In the brightness level converting apparatus, a brightness level converting section converts the brightness levels in the image pickup signal by using a brightness level converting function expressed by an S-shaped curve which indicates the relation between an input brightness level and an output brightness level and includes one inflexion point. Therefore, the contrast in a low brightness level range in the image pickup signal is reduced. At the same time, the contrast in a high brightness level range is reduced while appropriately keeping a gradation. With this, the contrast in an intermediate brightness level range in the image pickup signal is improved considerably. Therefore, the image represented by the image pickup signal whose brightness levels are converted becomes a further natural image.

The invention discloses a liquid crystal display device and a manufacture method of a color film substrate thereof. The liquid crystal display device comprises an array substrate, a color film substrate and a liquid crystal layer arranged between the array substrate and the color film substrate, wherein the color film substrate comprises a substrate, a color pixel graph and a black matrix graph, wherein the color pixel graph is arranged on the substrate in a matrix mode; the black matrix graph comprises a transverse structure and a vertical structure, is supported between the array substrate and the color film substrate, is in partial contact with the array substrate and is used for shading light and keeping the liquid crystal box thickness between the array substrate and the color film substrate. Compared with columnar spacers in the prior art, the black matrix graph of the color film substrate increases the supporting area so that the stability of the liquid crystal box thickness is increased to a large degree, and thereby, TOUCH MURA badness is effectively improved, and light leak badness and contrast reduction phenomena brought by observing from different viewing angles are effectively prevented.

Disclosed is a liquid crystal display device, a fabricating method, and a driving method thereof that includes at least one integrated photosensor that senses external light illumination on the liquid crystal display device. A sensing signal from the at least one photosensors are converted into a digital signal that is stored to represent an external illumination distribution. The liquid crystal display device includes a backlight that has a plurality of light sources that may be independently driven. A controller generates a control signal that independently drives the light sources in a manner corresponding to the illumination distribution. In doing so, areas of the liquid crystal display device may be provided with a greater amount of light from a corresponding light source so that externally illuminated areas of the liquid crystal display device do not suffer from reduced contrast.

The invention discloses a method for eliminating dynamic streaking of liquid crystal display. The concrete steps include: (a). convert images of two following frames into black and white brightness signal images; (b). compare the pixels at the corresponding position in the black and white brightness signal images and retain the pixel with a smaller grayness value; (c). form a frame of black frame insertion images (Gn) with the group of pixels obtained after the comparison of each pair of pixels; (d). insert the black frame insertion images (Gn) into images of two following frames. The method of the invention is to compare continuous image signals of two frames, and form a frame of 'new grayness distribution signal' with the darker pixels of each pixel position as the black frame insertion image to reach the purpose of lowering MPRT and eliminating streaking of dynamic images. The invention can not only overcome the shortcoming of the low efficiency of the black frame insertion technique, but also overcome the inadequate elimination of dynamic blurs and the high decline of the contrast in gray frame insertion technique. In addition, the method of obtaining insertion frames is simple and accessible, thus greatly saving the production cost.

The invention has for its object to provide an organic EL display driving system and method enabling an organic EL display to be driven with neither a contrast lowering nor a false light emission phenomenon yet in simple construction. The driving system and method drive an organic EL device which comprises at least one set of scanning electrodes and data electrodes arranged in a matrix fashion and an organic material-containing organic layer located between said scanning and data electrodes and taking part in at least a light emission function, with one closed circuit formed through at least one set of electrodes. When the scanning and data electrodes are driven, a given non-selection time is provided between driving one electrode and driving the next electrode.

The invention relates to a method for the joint of registering, archiving, contrast-retaining merging, and visualizing of 2D x-ray images and reconstructed 2D projections or 3D views of generated image data in minimally invasive medical interventions or operations performed under x-ray control on internal organs, areas of tissue, lesions, or pathological structures in a patient's body. A first image and the image data of a second image being mixed over the first image are mutually linked, co-registered, and merged using an alpha-channel-based mixing technique, whereby the color values or gray-scale values of the individual pixels of the first image are prior to being mixed-over with the segmented foreground of the second image brightened through the application of a color-value or gray-scale-value for compensating or lessening the reduction in contrast that occurs during mix-over in the first image before being displayed graphically on a monitor terminal.

An organic light emitting display apparatus capable of preventing or reducing an IR drop and a decrease in a contrast ratio, and a method of manufacturing the same. The organic light emitting display apparatus includes: a substrate; a plurality of thin film transistors on the substrate; a plurality of organic light emitting diodes, each of the organic light emitting diodes including: a pixel electrode electrically connected to a corresponding one of the thin film transistors, a portion of an opposite electrode, the opposite electrode being above the substrate and covering all of the substrate, and an intermediate layer between the pixel electrode and the opposite electrode and comprising at least an organic light emitting layer; an opposite electrode bus line between adjacent pixel electrodes of the organic light emitting diodes on the opposite electrode of the organic light emitting diodes; and a black matrix surrounding the opposite electrode bus line.

A projector includes a light source module, a diffuser for diffusing the light beam emitting from the light source module, and a fluorescent plate. The light source module includes a light source capable of emitting a first light beam, a dichroic device for diverging the first light beam into a second light beam and a third light beam, and a reflector with a moving frequency exceeding 20 Hz configured for reflecting the third light beam. The fluorescent plate is configured for converting the light beam passing through the diffuser into at least three kinds colored light beams.

An MVA type liquid crystal display panel of the present invention comprises a first substrate where a light transmission section consisting of a pixel electrode 15a, whose corner portions are chamfered, is formed at each position partitioned by scanning lines 13 and signal lines 14 that are arranged in a matrix state, in which a protruding electrode 40 extending from the pixel electrode 15a is formed between the chamfered position of the corner portion and the scanning line 13 to prevent the inclination of liquid crystal molecules due to the effect of the potential difference occurring between the scanning line and a common electrode. According to the present invention, it is possible to provide an MVA type of liquid crystal display panel having high contrast, where contrast reduction caused by the inclination of liquid crystal molecules due to the effect of the potential difference occurring between the scanning line and a common electrode is controlled, even where the liquid crystal display panel employs pixel electrodes with chamfered corner portions.

A white line detection apparatus comprises an extraction device that extracts an image of a white line detection processing area set within a road image captured by an image-capturing device, a maximum value estimating device that estimates a maximum value among pixel values constituting an image of road surface areas other than the white line based upon the pixel values representing the image extracted by the extraction device, a contrast reducing device that reduces the contrast of an image corresponding to pixel values equal to or lower than the maximum value among the pixel values constituting the image of road surface areas other than the white line which has been estimated and a detection device that detects the white line based upon the image whose contrast has been lowered by the contrast reducing device.

An image-forming apparatus includes a pre-charge exposure device which removes electric charge from a photoconductor drum to increase a potential contrast between the surface of the photoconductor drum and the surface of a charge roller in an upstream region of a nip region between the photoconductor drum and the charge roller in the rotating direction of the photoconductor drum, so that toner accumulating in an upstream region of the nip region in the rotating direction of the photoconductor drum is restrained and prevented from being discharged onto an image-forming region. When the toner accumulating in the upstream region of the nip region in the rotating direction of the photoconductor drum is to be discharged onto a non-image-forming region, the pre-charge exposure device is turned off so that the potential contrast decreases.

To provide a liquid crystal aligning agent useful to obtain a liquid crystal alignment film excellent in liquid crystal alignment properties, alignment controlling power and rubbing resistance, having high voltage retention characteristics and having reduced charge accumulation, and a liquid crystal display device which is less susceptible to display failure, to lowering of contrast or to image persistence.

A liquid crystal aligning agent comprising a low resistance polyimide precursor having a volume resistivity of from 1×10¹⁰ to 1×10¹⁴ Ωcm when formed into a film, and a high alignment polyimide precursor or polyimide having a specific structure, and a liquid crystal display device employing this liquid crystal aligning agent.

A multi-ply paper web comprises a base ply of a post-manufactured sheet such as reused old newsprint or reused office waste. An upper and/or lower ply bonded to the base ply covers any printing or contamination of the base ply, thus allowing the resulting web to be reprinted or used for writing or packaging grades. The base ply is not repulped, reducing water and energy usage in the manufacturing process. The upper and lower plies may be wet formed or dry formed. Dry-formed upper and/or lower plies result in a paper product utilizing little or no water in the manufacturing process, and no aqueous effluent. The post-manufactured base ply provides the strength ply. Multiple layers in the base ply or, alternatively, a contrast-reducing process on printed surfaces of the base ply, reduce show through of the final web.