82results about How to "Appropriate brightness" patented technology

A planar light source comprises at least one point light source disposed on a supporting substrate, and a cylindrical lens that covers the light emitting observation side of the point light source, wherein the cylindrical lens has a concave lens function in the direction (y direction) perpendicular to the supporting substrate, and has a convex lens function in at least part of the horizontal direction (x direction).

An electrooptic device includes: a display panel; an illuminating unit that emits light onto the display panel; an ambient-light measuring unit that measures the illuminance of ambient light; a luminance control unit including a light control profile for obtaining the optimum surface luminance of the display panel, the luminance control unit obtaining the optimum surface luminance on the basis of the measured illuminance of the ambient light using the light control profile, and controlling the luminance of the light to be emitted from the illuminating unit to provide the display panel with the optimum surface luminance; a display-mode switching unit that switches the display panel to a transmission display mode when the illuminance of the ambient light measured by the ambient-light measuring unit is lower than a predetermined illuminance, and switches the display panel to a reflection display mode when the illuminance of the ambient light is higher than the predetermined illuminance; and a storage unit that stores a gamma value for the transmission display for the transmission display mode and a gamma value for the reflection display for the reflection display mode as a plurality of tables. When the display panel is switched to the transmission display mode by the display-mode switching unit, the gamma value for the transmission display is obtained from the plurality of tables stored in the storage unit, and the gamma value for the transmission display is applied. When the display panel is switched to the reflection display mode by the display-mode switching unit, the gamma value for the reflection display is obtained from the plurality of tables stored in the storage unit, and the gamma value for the reflection display is applied.

An optical semiconductor device (A1) comprises a light reflector (5) and an optical semiconductor chip (3). The reflector (5) includes two first reflecting surfaces (50a) spaced from each other in direction x, and two second reflecting surfaces (50b) spaced from each other in direction y. The chip (3) includes a rectangular upper surface and a rectangular lower surface spaced from each other in direction z perpendicular to both of the directions x and y. The chip (3) further includes at least one light-emitting surface (31) extending between the upper and the lower surfaces. The light-emitting surface (31) faces a corresponding one of the second reflecting surfaces (50b). The light-emitting surface (31) is non-parallel to the corresponding second reflecting surfaces (50b) as viewed in parallel to the direction z.

An image display apparatus, comprises a display unit; a luminance sensor arranged in plural portions of the display unit, each luminance sensor having temperature characteristics; a temperature sensor arranged in plural portions of the display unit; an acquisition control unit configured to acquire a temperature value from the temperature sensor and a luminance value from the luminance sensor; a determination unit configured to determine a frequency for acquiring the temperature value from the temperature sensor based on an orientation of the display unit or a display setting; a correction unit configured to correct the luminance value acquired from the luminance sensor by using the temperature value acquired from the temperature sensor; and an image processing unit configured to control luminance of the display unit by using the luminance value corrected by the correction unit as a target luminance value.

The brightness of image data is previously defined based on the R, G, and B values of each pixel. In an image considered to have been exposed appropriately by a conventional method, when the brightness histogram for the defined image is computed, pixels having the maximum value in the definition of brightness always occupy a predetermined rate (1% or so) of all pixels. Based on this rule of thumb, the gain of an image acquisition device or the pixel value of acquired data is adjusted so that a brightness histogram (3) for image data which is an object of adjustment becomes a histogram (4) having the same characteristic as the above-mentioned appropriately exposed image.

An imaging device includes: an imaging unit that images a subject with three or more kinds of exposures, ratios of respective pairs of exposures of which adjacent to each other in an ascending order or a descending order are equal; and a combining unit that combines, on the basis of the ratios, pixel signals corresponding to the respective three or more kinds of exposures obtained by imaging the subject with the imaging unit.

The application discloses a light synthesis control system and a projector. The control system comprises a light source module for emitting a to-be-compensated primary light and primary compensation light for synthesizing first primary light with the to-be-compensated primary light, a controller for receiving at least a first path signal including an image signal of a first primary light signal and a second part signal including an image signal of a first primary light signal, and a spatial light modulator, connected with the controller electrically, being used for modulating the to-be-compensated primary light based on the first primary light signal in the first path signal received by the controller and modulating the primary compensation light according to the first primary light signal in the second path signal received by the controller. According to the application, the to-be-compensated primary light and the primary compensation light are modulated respectively according to the first primary light signals in the two-path signals, thereby realizing first primary light with the proper synthesized brightness and color.

The present technology relates to a reproduction device, a reproduction method, and a recording medium configured to display content having a large brightness dynamic range with appropriate brightness.

A reproduction device according to an aspect of the present technology reads second coded data from a recording medium recording the second coded data between first coded data of a standard video which is a video in a first brightness range and the second coded data of an extended video which is a video in a second brightness range, performs communication with a display device capable of displaying the extended video, thereby acquires identification information of the display device, acquires brightness adjustment data according to a specification of the display device used to adjust brightness of the extended video based on the identification information of the display device, adjusts the brightness of the extended video obtained by decoding the second coded data based on the brightness adjustment data, and outputs data together with brightness characteristic information representing a characteristic of the brightness of the extended video to the display device. The present technology can be applied to a player reproducing content.

Both a specific target and the background thereof in the image of a subject are caused to take on brightnesses that are relatively appropriate. Preliminary image sensing is performed to obtain a preliminary image of the subject. The image of a face is detected from within the preliminary image of the subject and the representative luminance of the face image is calculated. If the representative luminance calculated is not appropriate, then amount of exposure is adjusted so as to make the face image slightly darker than the appropriate brightness. Regular image sensing is then carried out. If the representative luminance of the face image in the image of the subject obtained by regular image sensing is not appropriate, a tone adjustment is applied utilizing a tone curve. Thus there is obtained an image of the subject in which both the face image and its background exhibit brightnesses that are relatively appropriate.

To provide a drive circuit, a drive method, a display device, and a projection display device capable of increasing contrast of an image a mean gray level (first gray level characterizing brightness) Gf is detected from an image signal DATA per unit time. On the basis of the mean gray level Gf, a variation signal DeltaS is set. By supplying the variation signal DeltaS to an opposing electrode, the image signal DATA applied to a liquid crystal layer is modulated. In accordance with an increase in the mean gray level Gf, the gray level of an effective signal applied to the liquid crystal layer (image signal modulated using the variation signal DeltaS) is set to be greater than the gray level of the unmodulated image signal.

Provided is a light characteristic adjustable lighting device, which comprises a luminance adjustable light source and a transparent substrate. The luminance adjustable light source provides excitation lines. The transparent substrate at least has a first area to a fourth area, wherein the first area to the fourth area respectively cover a first fluorescent power combination to a fourth fluorescent powder combination; and the excitation lines emit a first light to a fourth light respectively through the first fluorescent power combination to the fourth fluorescent powder combination. The first light has a first color rendering index and a first color temperature; the second light has a second color rendering index and a second color temperature, wherein the second color rendering index is larger than the first color rendering index, and the second color temperature is larger than the first color temperature; the third light has the second color rendering index and the first color temperature; and the fourth light has the first color rendering index and the second color temperature. The excitation lines are switched between the first area, the second area, the third area and the fourth area so as to select one light ranging from the first light to the fourth light.

The invention provides a light collector (1) comprising a luminescent material element (20), a discontinuous semi-transparent layer (40) adjacent to a first side of the luminescent material element (20), wherein due to the discontinuity of the semi-transparent layer (40) at least one first portion (21) of the luminescent material element covered by the semi-transparent layer and at least one second portion (21) of the luminescent material element not covered by the semi-transparent layer (40) are formed, and a light generating means (10) arranged at a second side of the luminescent material element (20). Further, a method for concentrating light in a light collector (1) is provided, comprising the following method steps: capturing light from the environment by means of a luminescent material (20), concentrating the light in the luminescent material (20) by means of a semi-transparent layer (40) arranged on the luminescent material (20) and light generating means (10), emitting the light in a pre-determined area (22) of the light collector (1) by means of an out-coupling structure (30) so as to generate a pre-determined light emitting image.

The invention discloses a micro-light-emitting diode. The micro-light-emitting diode comprises a first-type semiconductor layer, a second-type semiconductor layer, a first current control layer, a first electrode and a second electrode. The second-type semiconductor layer is connected with the first-type semiconductor layer. The first current control layer is connected to the first-type semiconductor layer, and is provided with at least one opening in the first-type semiconductor layer. The first electrode is electrically coupled to the first-type semiconductor layer. The second electrode is electrically coupled to the second-type semiconductor layer. At least one of the first and second electrodes is provided with a light transmission part, vertical projection of the first current control layer on at least one of the first and second electrodes is partially overlapped with the light transmission portion, and the light transmission portion is transparent or semi-transparent. Thereby the micro-light-emitting diode is provided with a small light-emitting area, so the light-emitting area of the micro-light-emitting diode can be continue being shrinked, and the dimension of the micro-light-emitting diode is maintained.

A video projector including replaceable light source lamps, a case that accommodates the light source lamps, lamp covers respectively corresponding to the light source lamps, a time measurement unit that measures an accumulated illumination time of each of the light source lamps, a control unit that determines whether or not the measured accumulated illumination time is greater than a replacement determination time, and notification units respectively corresponding to the light sources. Each notification unit is illuminated, when it is determined that the accumulated illumination time of the corresponding light source lamp is greater than the replacement determination time, to indicate where the corresponding lamp cover is located.

A flat panel display which can adjust a white balance to a proper level without changing the sizes of driving TFT active layers, even when an identical driving voltage is applied. The flat panel display also can obtain an appropriate luminance and prevent a reduction of its life span by supplying an optimal amount of current to each sub-pixel. The flat panel display includes a plurality of pixels. Each of the pixels includes a plurality of sub-pixels. Each sub-pixel having a self-luminescent element and driving thin film transistors. Each of the driving thin film transistors has a semiconductor active layer with at least a channel region connected to each of the self-luminescent elements to supply current to each of the self-luminescent elements. The channel regions of the semiconductor active layers are arranged in different directions in at least two sub-pixels.

An image display device includes a display unit that is installed inside a finder window provided in a housing and displays images, an illumination unit that illuminates a space inside the finder window, and a control unit that when brightness of the display unit is a first brightness, sets the brightness of the illumination unit to a second brightness, and when the brightness of the display unit is a third brightness brighter than the first brightness, sets the brightness of the illumination unit to a fourth brightness brighter than the second brightness.

The invention discloses a digital instrument character recognition method. The method comprises the following steps of: (1) preprocessing an acquired digital instrument image; (2) carrying out regionpositioning on the image preprocessed in the step (1) by adopting an improved pixel point statistics method to obtain a character region in the digital instrument image, and completing region positioning; (3) performing character segmentation on the character region in the step (2) through an average segmentation method to segment a single character in the image; then entering the step (4); and (4) identifying a single character according to different numbers of connected domains of the characters and different centroid coordinates, and determining a numerical value of each character. The method has the advantages that an improved pixel point statistics method is adopted to carry out region selection, and character regions under the condition of all '0', all '1' or '0' and '1' combinationare accurately positioned; character recognition is performed by adopting a method based on connected domain quantity statistics and centroid coordinate comparison, and the method is simple in principle, low in calculation overhead, rapid in recognition and easy to implement.

A back light apparatus includes an external light quantity detecting unit having a first and second light quantity detecting sections, both of which are provided at a predetermined position of the housing, a first polarizing plate provided on a light receiving surface of the first light quantity detecting section, which first polarizing plate has a polarizing axis perpendicular to that of a polarizing plate provided on the rear surface side of the liquid crystal panel, a second polarizing plate provided on the light receiving surface of the second light quantity detecting section, which second polarizing plate has the same polarizing axis as that of the polarizing plate provided on the rear surface side of the liquid crystal panel, and an external light quantity calculating section to calculate the external light quantity based on the difference value between light quantities detected by the first and second light quantity detecting sections.

The invention provides a wire drawing belt, a method for manufacturing a metallic glass plate by using the wire drawing belt and the metallic glass plate. The wire drawing belt comprises a substrate material and an abrasive material; the substrate material is a non-woven fabric, the abrasive material is aluminium oxide or silicon carbide, and the grain size of the abrasive material is 50-600 meshes; and the abrasive material adheres to the substrate material. The method for manufacturing the metallic glass plate by using the wire drawing belt comprises the following steps: selecting transparent glass as a glass substrate; successively drawing long wires and broken wires on the surface of the glass substrate by using the wire drawing belt to obtain a wire drawing layer; printing brighteninggloss oil resin on the surface of the precisely treated wire drawing layer, and then sintering to obtain a wire drawing brightening layer; and printing protecting coloring resin on the surface of thewire drawing brightening layer, and then sintering to obtain the metallic glass plate. The metallic glass plate is manufactured by the method. The wire drawing belt and the metallic glass plate obtained by the method for manufacturing the metallic glass plate are suitable in color and good in surface wire drawing effect, and are attractive.

The present invention relates to image processing. More particularly, the present invention provides methods for efficient image decolorization and color image enhancement. The methods of the present invention comprise decolorization in frequency domain, adaptive brightness control for an enhanced grayscale image and color image enhancement. The present invention is able to improve sharpness and fine details in both enhanced grayscale and color images.