47results about How to "Variation in brightness" patented technology

A backlight device is divided into multiple regions, and has a configuration in which light emitted from a light source of each of the regions is allowed to leak to other regions. A maximum gradation detector detects a maximum gradation of a regional image signal displayed on each of the regions of the liquid crystal panel. An image gain calculator obtains a gain to be multiplied to each regional image signal. An emission luminance calculator obtains an emission luminance of light to be emitted by each light source, by using an operation expression according to the emission luminance of light to be emitted by the backlight device. At this time, if the emission luminance takes a negative value as a result of calculation, the emission luminance calculator makes a correction so that the emission luminance can take a value equal to or greater than 0.

A light source module includes: a light source; a lighting curtain that partially blocks light from the light source; and a reflective layer that is provided on the lighting curtain and that has a planar shape smaller than the lighting curtain.

In an LED package, LED chips are connected in parallel by wires between lead frames connected to terminals. When an open circuit failure such as the coming off of the wire occurs in one of the LED chips in the LED package that is being energized, a current twice as high as that flowing through the other LED chip prior to the open circuit failure is passed through the other LED chip, and thus the amount of light emitted therefrom is increased about two-fold. Consequently, the amount of light emitted from the LED package does not change significantly.

There is provided a liquid crystal display device of high picture quality with high brightness and small display unevenness.

A vertical alignment type liquid crystal display device which has a plurality of pixels includes: a first electrode which includes, in each of the plurality of pixels, a plurality of first branch portions extending in a first direction and a plurality of second branch portions extending in a second direction that is different from the first direction; a second electrode disposed so as to oppose the first electrode; and a liquid crystal layer interposed between the first electrode and the second electrode, wherein a width of each of the plurality of first branch portions and the plurality of second branch portions is in a range not less than 1.4 μm and not more than 8.0 μm.

A display portion in which pixels are arranged in a matrix is formed on a display panel and a drive current line, which supplies a drive current from a terminal formed at a side along a column direction to a display element in each pixel, includes a branch line provided for each column of the display portion and along each column of the display portion; a trunk line to which the branch line is connected and which extends along a row direction at a peripheral portion at a lower side of the display portion; and a connection line which connects the trunk line and the terminal. The connection line is separated from a region of the trunk line near the terminal by a slit provided from a side of the trunk line near the terminal to a side of the trunk line distanced from the terminal and extends in parallel to the region of the trunk line near the terminal at the peripheral portion at the lower side of the display portion from a region in which the terminal is formed. The connection line is connected to the trunk line at an intermediate position of the peripheral portion at the lower side of the display portion along the row direction. A length of the slit and a width of the region of the trunk line near the terminal are optimized to inhibit brightness variation within the display portion.

The present invention is directed to an infrared zoom lens that consists merely of optical components of germanium so as to implement an optical system that is capable of reducing variation in brightness during varying a magnification rate and is quite bright and that facilitates compensating for aberration, especially spherical aberration that is generally hard to do, thereby producing a clear and vivid image. The infrared zoom lens comprises first to fourth groups of lens pieces arranged in series from the foremost position closest to the object; each of the lens groups having all the lens pieces made of germanium, and at least one of the lens groups consisting simply of a single lens piece.

A pattern matching system, comprising a receiver, a comparison block, a calculation block, an output block, a ratio reading block, and a controller, is provided. A likeness value indicates how much a first and second image accords to each other. The receiver receives first and second image signal corresponding to the first and second images as an area signal. The comparison block compares the signal levels of the area signals corresponding to the pattern areas at the relatively same location of the first and second images. The calculation block calculates the likeness value. The ratio reading block reads a amplification ratio by which the first and second image signals are amplified. The controller changes the type of the signal components of the area signal used for the comparison by the comparison block and the calculation of the likeness value by the calculation block.

A lens barrel and imaging device advantageous for making unnatural brightness variation in an image, due to a liquid-crystal light control element, less noticeable, while reducing the size of an optical system, are disclosed. A lens barrel comprises an optical system, a rectangular planar liquid-crystal light control element, and an imaging element. An object image captured by the optical system is guided to the imaging element through the control element comprising a liquid crystal layer sealed in between a pair of alignment layers and containing rod-shaped liquid crystal molecules. A sensor unit of the imaging element has a rectangular imaging area. Light rays guided from the optical system to the imaging element diverge away from an optical axis. An orientational direction of the control element is substantially parallel to the shorter sides of the imaging area.

A light emitting device includes a substrate having an element mounting area in a principal surface thereof. The light emitting device also includes at least one light emitting element mounted in the element mounting area of the substrate. The light emitting device also includes a heat transfer member provided on the substrate. The heat transfer member has a thermal conductivity different from thermal conductivity of the substrate so as to form uneven thermal resistance distribution in the element mounting area. Thermal resistance in a heat radiation path through the substrate for release of heat emitted from the light emitting element changes with the mounting position of the light emitting element.

A radiographic image detector includes a phosphor layer, a heat shield layer, and a photoelectric converter in this order, wherein the heat shield layer has a thickness T (μm) and a thermal conductivity C (W/m·K) satisfying that C/T is from 0.004 to 5.

At least two TFTs which are connected with a light emitting element are provided, crystallinities of semiconductor regions composing active layers of the respective TFTs are made different from each other. As the semiconductor region, a region obtained by crystallizing an amorphous semiconductor film by laser annealing is applied. In order to change the crystallinity, a method of changing a scan direction of a continuous oscillating laser beam so that crystal growth directions are made different from each other is applied. Alternatively, a method of changing a channel length direction of TFT between the respective semiconductor regions without changing the scan direction of the continuous oscillating laser beam so that a crystal growth direction and a current flowing direction are different from each other is applied.

An electro-optical device includes a scan line, a data line, a pixel circuit provided at an intersection of the scan line and the data line, a first high potential line, a first low potential line, a second high potential line, and a second low potential line. The pixel circuit includes a light emitting device, a memory circuit disposed between the first high potential line and the first low potential line, a first transistor of N-type including a gate electrically connected to the memory circuit, and a second transistor disposed between the memory circuit and the data line. The light emitting device and the first transistor are disposed in series between the second high potential line and the second low potential line.

A scanner reads an original and generates a read image, specifies a first region having a pattern on a wrinkle and a second region having a wrinkle and no pattern from the read image, and performs a wrinkle reduction process in which the wrinkle is not reduced in the first region and the wrinkle is reduced in the second region, included in the read image.