183results about How to "Reduce graininess" patented technology

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.

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.

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.