33results about How to "Maximum luminance" patented technology

A light module of a motor vehicle generates a spot distribution of a high-beam-light distribution formed by superimposition of the spot distribution and a base distribution generated by at least one other module. The light module comprises a plurality of separately controllable sub-modules that generate a plurality of stripe-shaped segments of the spot distribution that supplement it. Also, a headlight generates the high-beam-light distribution and comprises the light module. Furthermore, a headlight system comprises a pair of the headlights disposed in a front region toward sides of the vehicle and each of which generates the high-beam-light distribution. The headlights include corresponding light modules that generate stripe-shaped segments of left and right sides, respectively, of the spot distribution such that the stripe-shaped segments of the light modules of the headlights supplement the spot distribution or are at least partially superimposed thereon.

A projection display system has at least one light-recycling illumination system, a color scroller and an imaging light modulator. The light-recycling illumination system includes a light source that is enclosed within a light-recycling envelope. The light source is a light-emitting diode that emits light, and a fraction of that light will exit the light-recycling envelope through an aperture. The light-recycling envelope recycles a portion of the light emitted by the light source back to the light source in order to enhance the luminance of the light exiting the aperture. The fraction of the light that exits the aperture is partially collimated and is directed to a color scrolling means. The color scroller scans the partially collimated light across the face of the imaging light modulator. The imaging light modulator spatially modulates the scrolled beam of light to form an image.

An eye (EY) of a person to be shot is illuminated coaxially with the optical axis of a camera (11), and then, is shot. At this time, a retinal reflex is caused and the luminance in the pupil region becomes high if the eye (EY) is a living eye. A living eye judgment section (17) judges whether an eye included in the image is a living eye is performed based on the luminance in the pupil region of the image captured by the camera (11).

A planar light source has a light emitting source, and a light guide plate for receiving light beams emitted from the light emitting source at a front side thereof and changing direction of the light beams, discharging the light beams from an upper surface thereof. A first anisotropic diffusion surface is formed on a lower surface of the light guide plate, and a reflection member is provided on the first anisotropic diffusion surface. The first anisotropic diffusion surface is a hologram diffusion surface or a hairline diffusion surface.

A light module of a motor vehicle generates a spot distribution of a high-beam-light distribution formed by superimposition of the spot distribution and a base distribution generated by at least one other module. The light module comprises a plurality of separately controllable sub-modules that generate a plurality of stripe-shaped segments of the spot distribution that supplement it. Also, a headlight generates the high-beam-light distribution and comprises the light module. Furthermore, a headlight system comprises a pair of the headlights disposed in a front region toward sides of the vehicle and each of which generates the high-beam-light distribution. The headlights include corresponding light modules that generate stripe-shaped segments of left and right sides, respectively, of the spot distribution such that the stripe-shaped segments of the light modules of the headlights supplement the spot distribution or are at least partially superimposed thereon.

A display device includes: a display panel including a plurality of pixels; and a controller configured to adjust a data signal applied to each of the plurality of pixels, and the plurality of pixels includes a plurality of pixel blocks, and the controller is configured to calculate a remaining lifespan of each of the plurality of pixel blocks and to adjust a maximum luminance of pixels between a first pixel block and a second pixel block based on a remaining lifespan of the first pixel block, by selecting the first pixel block and the second pixel block based on the remaining lifespan of each of the pixel blocks.

An image display apparatus is provided for performing image display by dividing one frame period into a plurality of sub-frame periods, determining a gradation level of each of the sub-frame periods in accordance with a gradation level of an input image signal and supplying the determined gradation level to an image display section. The image display apparatus comprises a display control section, wherein the display control section supplies a relatively largest gradation level in a relatively central sub-frame period which is at a time-wise center or closest to the time-wise center of one frame period, and supplies a sequentially lowered gradation level in a sub-frame period which is sequentially farther from the relatively central sub-frame period.

The present invention relates to a luminescent photovoltaic generator (1) and a waveguide for use in such a photovoltaic generator. The photovoltaic generator comprises a photovoltaic cell (4) and a waveguide comprising a transparent matrix (2) having particles of an inorganic luminescent material dispersed therein and / or an inorganic luminescent material disposed at least one side thereof (6). The waveguide is associated with the photovoltaic cell (4), such that, in use, at least some of the light emitted from the luminescent material passes into the photovoltaic cell (4) to generate a voltage in the cell. In preferred embodiments, the inorganic luminescent material is a line emitter and the emission is due to a forbidden electronic transition within the material. The inorganic luminescent material may be selected from an inorganic phosphor, an inorganic fluorescent material and quantum dots, quantum rods and quantum core / shell systems. The photovoltaic generator (1) is an alternative to or an improvement upon known photovoltaic generators, which generally suffer from a lack of power yield per area.

A headlight for a motor vehicle includes a plurality of illuminants, wherein the illuminants are arranged in a matrix which has a first direction of extension and a second direction of extension which is perpendicular to the first direction of extension. In order to operate the headlight more efficiently a value of the luminance is individually adjustable for each of the illuminants, and the value of the luminance of the respective illuminants is adjustable in dependence on a position of the illuminants along the first direction of extension and / or the second direction of extension according to at least one predetermined distribution function.

An apparatus for converting a digital pixel signal to a gamma voltage signal for a pixel in a liquid crystal display (LCD), wherein the digital pixel signal corresponds to the pixel. The apparatus includes a pixel signal converting unit for converting the digital pixel signal to a converted pixel signal and a gamma correction unit coupled to the pixel signal converting unit for outputting the gamma voltage signal according to the converted pixel signal. The relation between the digital pixel signal and the converted pixel signal is determined according to a display color of the pixel.

An eye (EY) of a person to be shot is illuminated coaxially with the optical axis of a camera (11), and then, is shot. At this time, a retinal reflex is caused and the luminance in the pupil region becomes high if the eye (EY) is a living eye. A living eye judgment section (17) judges whether an eye included in the image is a living eye is performed based on the luminance in the pupil region of the image captured by the camera (11).

The present invention discloses a warm-white-light emitting diode has the substrate of indium gallium nitride (InGaN) heterojunction containing a large amount of quantum wells and having a light conversion polymer layer, characterized by that the light conversion polymer layer is uniform in concentration, the light-emitting surface and edges of the indium gallium nitride heterojunction are covered with a thermosetting polymer, and the light conversion polymer layer contains some fluorescent powders, which are formed as at least two particle layers in the light conversion polymer layer to ensure the light transmitted reaching 20% of the first-order blue light and 70-80% of the second-order orange-yellow light from the indium gallium nitride heterojunction. The present invention also discloses a fluorescent powder.

An apparatus (1) serves for linear illumination of a moving product web (6), the apparatus (1) having at least one light source (4) emitting light. In order to achieve high luminance in a linear subregion of the product web (6), at least a portion of the light emitted by the light source (4) is reflected towards the product web (6) by at least one tubular reflector (5). The tubular reflector (5) in this case has at least one light exit slit (7) which is assigned to the product web (6). Moreover, the tubular reflector has at least one observation slit (8) which lies opposite the light exit slit (7). The illuminated product web (6) can be observed through this observation slit (8) by means of a line camera (2).

A light guide and a display device incorporating the same are provided. The light guide includes a first surface, a second surface and a lateral surface. The first surface is for receiving a light beam. The second surface is for guiding the light beam and is opposite to the first surface. The second surface has an irregular structure for reducing a luminous flux of a total reflection of the light beam projected on the second surface. The lateral surface is for connecting the edges of the first surface and the second surface. Meanwhile, the luminous flux of the light beam from the first surface to the second surface is larger than the luminous flux of the light beam from the first surface to the lateral surface.

A displacement sensor is provided with: a light-projection unit; a light-receiving unit having a light-shielding mask and a light-receiving element; a first light-converging element which converges luminous fluxes released from the light-projection unit on a measuring object; a second light-converging element which converges reflected luminous fluxes on the light-receiving unit; a first light-path control element which allows a projection-light light axis and a receiving-light light axis to be coaxially set on the measuring object side; and a light-path length sweeping mechanism which continuously changes a light-path length from the light-projection unit to the measuring object and a light-path length from the measuring object to the light-receiving unit.

A circuit and method of driving a display panel requiring gray scale control wherein the voltage applied to a row of pixels is equal to the sum of voltages of opposite sign with respect to ground applied respectively to the row electrode and column electrodes whose intersection with the row defines the pixels. Gray scale is realized through modulation of the voltage applied to the column electrodes. Typically for video application, 256 individual gray levels are required corresponding to luminance levels ranging from zero (no emissive luminance) to full luminance. The required luminance for each gray level is not a linear function of the gray level number but rather corresponds to an approximate quadratic function of this number. The present invention facilitates generation of luminance values for each gray level that approximates this functional dependence (i.e. Gamma corrected) with a non-linear voltage ramp terminated by a digital clock having 256 (8 bit) resolution. The voltage at the ramp termination is held at a constant value and fed to the output buffer of the gray scale drivers for the display columns.

A headlight for a motor vehicle includes a plurality of illuminants, wherein the illuminants are arranged in a matrix which has a first direction of extension and a second direction of extension which is perpendicular to the first direction of extension. In order to operate the headlight more efficiently a value of the luminance is individually adjustable for each of the illuminants, and the value of the luminance of the respective illuminants is adjustable in dependence on a position of the illuminants along the first direction of extension and / or the second direction of extension according to at least one predetermined distribution function.

A pixel based 3D display (10) comprising a display panel (11), a striped polarizer (12) and a display controller (15). The display panel (11) comprises a plurality of pixels (41, 42) arranged in rows and columns, each pixel (41, 42) comprising at least four sub-pixels having different colors, the sub-pixels being arranged in two sub-rows and at least two sub-columns, the arrangement of the two sub-rows of two adjacent pixels in the same row being interchanged. The striped polarizer (12) overlays the display panel (11) and comprises stripes (13, 14) of transparent polarizing material, the stripes (13, 14) being arranged in an alternating pattern of left eye stripes (13) and right eye stripes (14), wherein the left eye stripes (13) are arranged for converting light to a first polarization and are overlaying one sub-row of the two sub-rows and wherein the right eye stripes (14) are arranged for converting light to a different second polarization and are overlaying the other sub-row of the two sub-rows. The display controller (15) is arranged for using sub-pixel rendering for controlling a light output of the pixels in accordance with a 3D image to be displayed.

A ghost detection method for high-dynamic range (HDR) image creation using multi-level median threshold bitmapping. At each of multiple levels, median threshold bitmaps (MTBs) are generated for each original low-dynamic range image. At each level, the MTBs of the multiple original images are compared to generate a ghost map for each original image which indicates the locations of ghost pixels in the original image. For each original image, the ghost maps generated at the multiple levels are combined to generate a combined ghost map. The multiple combined ghost maps can then be used in creating the HDR image, for example, by discarding pixels in an original image that are indicated by the corresponding combined ghost map as being a ghost pixel.

An LED lamp includes a lamp-lid, a metal lamp-cup, an insulating layer for connecting a lamp-cap and the metal lamp-cup, LEDs, a semispherical pallet or an astigmatism plate, and a PCB (Printed Circuit Board) in the metal lamp-cup, characterized in that, one semispherical pallet is provided on said PCB, the semispherical pallet has the same number of holes as that of the LEDs, the LEDs are installed in the holes of the semispherical pallet, electrical connections of the LEDs are connected to the PCB through the semispherical pallet, and provided with power. The LEDs installed in this way are mounted on the semispherical pallet and arranged in a semisphere, thus light of the LEDs is radiated in various directions, increasing the light emitting angle of the LEDs, or the semispherical pallet is replaced by the astigmatism plate made of transparent or subtransparent material, the said metal lamp-cup is a larger area lamp cup made of metal or heat conduct materials; thus facilitating the heat emission of the LED lamp.

A projection display uses a light modulating device to modulate, in accordance with image data, light radiated from a light source, project the modulated light onto a screen, and display an image. The projection display separates a unit of time configuring the image data into an effective light time when the light modulating device can express the light as an image on the screen and an ineffective light time when the light modulating device cannot express the light as an image on the screen. The projection display increases the power supplied to the light source during the effective light time over the power supplied to the light source during the ineffective light time.

A lens substrate (microlens substrate 1) having a first surface and a second surface opposite to the first surface is disclosed. Light is allowed to enter the lens substrate from the first surface thereof and then exit from the second surface thereof. The lens substrate includes: a plurality of convex lenses (microlenses 21) formed on the first surface of the lens substrate from which the light is allowed to enter the lens substrate; and a colored portion 22 provided on the first surface of the lens substrate with the plurality of convex lenses. The colored portion 22 is constituted from a plurality of regions each having a different content by percentage of a coloring agent, and the plurality of regions are laminated in the thickness direction of the colored portion 22.

A display device includes: a display panel including a first display area including first sub-pixels to display an image, and a second display area including second sub-pixels and a transmission area adjacent to the second sub-pixels; and an optical device overlapping the second display area of the display panel and configured to detect light incident through the transmission area. Each of the second sub-pixels includes: a first contact electrode; a second contact electrode located apart from the first contact electrode; and a light emitting element between the first contact electrode and the second contact electrode.

A driving method for a color liquid crystal display which drives the color liquid crystal display based on a video red signal, a video green signal and a video blue signal by independently applying a gamma compensation to a clamped video red signal, a clamped video green signal and a clamped video blue signal in gamma compensating circuits in order to make suitable to a red transmittance characteristic, a green transmittance characteristic and a blue transmittance characteristic. With this operation, it is possible to carry out an optimal gamma compensation suitable to a characteristic of the color liquid crystal display and to remove a gradation batter occurring in a specific color.

The present disclosure relates to a technology or improving the efficiency of light emitting diode (LED) elements and extending the lifespan thereof, significantly reducing cost and improving efficiency of a power supply while supplying sufficient LED driving power to an LED lamp module without the use of an output-side electrolytic capacitor need in a converter, and extending the lifespan of the converter. Consequently, the present disclosure relates to a technology of reducing product cost and maintenance cost and extending the lifespan of an LED lighting device.

A ghost detection method for high-dynamic range (HDR) image creation using multi-level median threshold bitmapping. At each of multiple levels, median threshold bitmaps (MTBs) are generated for each original low-dynamic range image. At each level, the MTBs of the multiple original images are compared to generate a ghost map for each original image which indicates the locations of ghost pixels in the original image. For each original image, the ghost maps generated at the multiple levels are combined to generate a combined ghost map. The multiple combined ghost maps can then be used in creating the HDR image, for example, by discarding pixels in an original image that are indicated by the corresponding combined ghost map as being a ghost pixel.

The present invention discloses a warm-white-light emitting diode has the substrate of indium gallium nitride (InGaN) heterojunction containing a large amount of quantum wells and having a light conversion polymer layer, characterized by that the light conversion polymer layer is uniform in concentration, the light-emitting surface and edges of the indium gallium nitride heterojunction are covered with a thermosetting polymer, and the light conversion polymer layer contains some fluorescent powders, which are formed as at least two particle layers in the light conversion polymer layer to ensure the light transmitted reaching 20% of the first-order blue light and 70˜80% of the second-order orange-yellow light from the indium gallium nitride heterojunction. The present invention also discloses a fluorescent powder.

An aryldiamine compound represented by formula (1) and an organic electroluminescent device including a pair of electrodes and at least one organic layer disposed therebetween wherein the at least one organic layer contains the aryldiamine compound. The aryldiamine compound is excellent in hole transporting properties, hole injection properties, electron blocking properties, stability in thin film form, and heat resistance. The organic electroluminescent device achieves high emission efficiency and power efficiency, drives at a low voltage, and, in particular, has a long life.