183results about How to "Reduce graininess" patented technology

A recording method is provided which enables formation of an image with high image density and low graininess. The recording is conducted by using a recording method using a first aqueous ink for higher-density recording and a second aqueous ink for lower-density recording, characterized in that the first aqueous ink comprises at least water, a water-insoluble coloring material, and plurality of water-soluble organic solvents, the plurality of water-soluble organic solvents including a good medium or good mediums for the water-insoluble coloring material and a poor medium or poor mediums for the water-insoluble coloring material, the ratio B/A in the second aqueous ink being less than the ratio B/A the first aqueous ink, where A denotes the total content (mass %) of good medium based on the total mass of the aqueous ink and B denotes the total content (mass %) of poor medium based on the total mass of the aqueous ink; and the second aqueous ink has the same hue as the first aqueous ink.

A color image forming apparatus forms an image using a deep toner and a pale toner at least for one color such that the pale toner is used to form an image in a high lightness area, and the pale toner and the deep toner are used in combination to form the image in a half tone area. A toner kit has a deep toner and a pale toner which are separated from each other. A method for forming an image uses the color image forming apparatus, the toner kit, and the deep toner and the pale toner. A high quality image can be formed while inhibiting graininess and roughness over a broad image area.

The conductive sheet according to the present invention includes a base and a conductive portion that is formed on at least one main surface of the base and is formed from a plurality of thin metal wires, where a mesh pattern in which different mesh shapes are arrayed in plan view is formed by the conductive portion, and the mesh pattern is configured such that, in a power spectrum of a two-dimensional distribution of centroid positions of the mesh shapes, an average intensity on a higher spatial frequency band side than a predetermined spatial frequency is larger than an average intensity on a lower spatial frequency band side than the predetermined spatial frequency. The conductive sheet can reduce the granular feeling of noise due to pattern which the conductive sheet has and greatly improve the visibility of an object for observation.

An LED tube light which includes LED light sources mounted in LED leadframes is disclosed. The LED leadframe has a recess, a first sidewall and a second sidewall. Each LED light source includes an LED leadframe and an LED chip, in which LED chip is disposed in recess of LED leadframe. A height of first sidewall of LED leadframe is lower than a height of second sidewall thereof. Inner surface of the first sidewall is a sloped flat or curved surface facing towards outside the recess. First sidewalls of the LED leadframe are arranged along a length direction of the light tube, and second sidewalls of the LED leadframe are arranged along a width direction of the light tube. The LED tube light further includes an LED light bar. The LED light sources together with the LED leadframes are mounted on the LED light bar.

The present invention discloses a liquid crystal display panel, which is composed of a red pixel unit, a green pixel unit and a blue pixel unit arranged in a matrix. Each adjacent two rows of pixel units form one pixel unit group, the polarities the pixel units in the same column in the same pixel unit group are the same, and the polarities of the pixel units in the same column in the adjacent two pixel unit groups are opposite to solve the color shift problem existing in the viewing at a large viewing angle; and the polarities of the adjacent red pixel units in each row of pixel units change alternately and the polarities of the adjacent blue pixel units in each row of pixel units alternately change so as to weaken the grainy sense generated on the entire display picture and thus greatly improving the display effect. The invention also provides a liquid crystal display device with the abovementioned liquid crystal display panel.

The present invention provides: a toner kit having a deep toner and a pale toner which are separated from each other, wherein: the deep toner and the pale toner satisfy prescribed conditions for an L*a*b* color coordinate system where a* represents a hue in the red-green direction, b* represents a hue in the yellow-blue direction, and L* represents a lightness; the pale toner and the deep toner to be used in the toner kit; and a method for forming an image using the toner kit. Thus, the present invention can form a high quality image, while suppressing graininess and roughness over the areas covering from the low density area to the high density area.

To generate a threshold matrix which is compared with an original image in creating a halftone dot image for each color component, in a matrix area for one color component, dot centers are arranged almost uniformly in a random fashion at a predetermined density and in a matrix area for another color component, dot centers are arranged almost uniformly in a random fashion at a density about 0.7 times the predetermined density. Then, threshold values are set so that dots should grow around the dot centers in accordance with an increase in gray level of the original image, to generate the threshold matrix for each color component. In creating the halftone dot images by using these threshold matrixes, characteristics of spatial frequency of the halftone dot images of these color components can be represented in a frequency space as areas (75K, 75C) in a shape of concentric rings. As a result, it is possible to create a multicolor halftone dot image with less graininess, with no portions approximate to each other in the characteristics of spatial frequency of these halftone dot images.

The water-based ink set for ink-jet recording includes a cyan ink and a blue ink with dynamic surface tensions thereof satisfying the following inequalities (I_CB), (II_CB), (III_CB) and (IV_CB)

σ_30C≦about 49 mN/m  (I_CB)

σ_30C+σ_30B≦about 100 mN/m  (II_CB)

wherein σ_30C is the dynamic surface tension of the cyan ink at a lifetime of 30 ms and σ_30B is the dynamic surface tension of the blue ink at a lifetime of 30 ms,

σ_1000B≧about 36 mN/m  (III_CB)

σ_1000C+σ_1000B≧about 70 mN/m  (IV_CB)

wherein σ_1000C is the dynamic surface tension of the cyan ink at a lifetime of 1,000 ms and σ_1000B is the dynamic surface tension of the blue ink at a lifetime of 1,000 ms.

The invention discloses a pixel structure, a driving method thereof, a display panel and a display device. Each pixel group is divided into three columns of pixel areas, the length of sub-pixels in the first-column pixel area is greater than that of each sub-pixel in the second-column pixel area and the third-column pixel area in the column directions, the colors of any two adjacent sub-pixels inthe column and row directions in each pixel group are different, and therefore high display resolution is achieved by utilizing low physical resolution of the pixel structure. According to the pixel structure, the sawtooth and particle senses during display can be reduced because of the arrangement mode, the luminous performance of the sub-pixels different in color is fully utilized, and thereforean image is displayed more evenly.

The present invention provides a lighting device which can high efficiently extract white light and reduce granular sensation about light source. The lighting device includes: plural semiconductor luminescent components, transparence substrate, transparence bonding layer, reflection member, transparence sealing member, luminophore layer. The luminescent components has semiconductor luminescent layer on back laminated layer of transparence component substrate and extracts the light emitted from the luminescent layer. Lead (conductive portion) of the transparence substrate is connected with p side and n side electrodes of the luminescent component. The backside of the transparence substrate is bonded with surface of component substrate of each luminescent component via the bonding layer. The seal member is arranged at back side of the transparence substrate to seal the luminescent component. The reflection member covers the seal member. The luminophore layer covers the surface of the transparence substrate. The luminophore layer includes luminophore for wavelength convertion of first light emitted by the semiconductor luminescent layer to second light with different wavelength.

The water-based ink set for ink-jet recording includes a cyan ink and a blue ink, or a cyan ink and a green ink. The cyan ink is a light cyan ink having a lightness (L*) of about 60 or more in the L*a*b* colorimetric system. A normal cyan ink having a lightness (L*) of about 60 or less in the L*a*b* calorimetric system is not included in the ink set.

Provided are an ink jet ink set, an ink jet recording method, and an ink jet recording apparatus each of which can reduce the graininess of an image to be recorded and improve the water fastness of the image even in a recording medium such as plain paper. The ink jet ink set has a first ink and a second ink independently, and is used so that the first and second inks overlap each other at least partly upon application of the inks to a recording medium. The first ink contains at least a pigment and a silicone oil. The second ink contains at least a pigment and a graft polymer that includes at least a nonionic unit represented by the general formula (I) and a unit having a polysiloxane structure.

The image processing method and apparatus use a digital half-toning technique. The method and apparatus split a continuous tone image into split regions, compute an area size of each of the split regions and select an optimum halftone best suited to each of the split regions depending on the thus computed area size of each of the split regions. The program implements the above image processing method by control with a computer. The above program is written to the recording medium and can be read with the computer from the recording medium.

A light emitting diode (LED) display screen comprises a circuit base board, and a plurality of luminous units and a light mixing device which are connected onto the circuit base board, wherein the light mixing device is installed on the circuit base board in detachable mode, the luminous units are located between the circuit base board and the light mixing device, and the light mixing device refracts light rays sent out from the luminous units. According to the LED display screen, after the light rays sent out from the luminous units are refracted by the light mixing device, light emitting angles of the light rays, which are formed on the surface of the light mixing device, are increased, light intensity of central areas of the luminous units are weakened, and light intensity of marginal areas of the luminous units are relatively intensified. Accordingly, luminance uniformity of a frame of the LED display screen is improved, granular sensation and dazzling sensation of the frame displayed by the LED display screen are reduced, and therefore good display effects are obtained. Additionally, compared with an existing method for improving the display effects by increasing the density of the luminous units, needed display effects of the LED display screen can be achieved without need of improving circuit board configuration difficulty or increasing the quantity of the luminous units, and preparation cost of the LED display screen is reduced.

The invention discloses a method for treating a texture distortion area of a digital orthoimage. The method comprises the following steps: I, obtaining original measurement data of a measured area; II, determining a ground grid range of the digital orthoimage; III, detecting texture distortion, namely respectively performing texture distortion detection on each grid point on a corrected image of a currently treated aerial photography image through the following processes: 301, determining the direction of projection light; 302, judging texture distortion, namely judging whether other grid points identical to the pixel point to which the current detected point corresponds on an original image exist or not along the determined projection light; if so, judging the currently detected point as a 'texture distortion' point; if not, judging the currently detected point as a 'non-texture-distortion' point; and IV, correcting the image, namely correcting the currently treated aerial photography image according to the result of the texture distortion detection. The method has the advantages of simple steps, reasonable design, high efficiency and good using effect and can be used for solving the problems of low efficiency, poor use effect and the like in the existing orthoimage texture distortion treating method.